{"title":"2 Slot Linear Diffuser","description":"\u003ch2\u003e2 Slot Linear Diffuser: The Complete Residential Buying Guide\u003c\/h2\u003e\n\u003cp\u003eA \u003ca href=\"https:\/\/www.greenvent.us\/collections\/2-slot-linear-diffuser\/#\"\u003e2 slot linear diffuser\u003c\/a\u003e is a modern, aluminum air outlet featuring two parallel discharge slots — and it is the version most residential homeowners reach for when replacing outdated, bulky \u003ca href=\"https:\/\/www.greenvent.us\/collections\/air-vent-covers\"\u003event covers\u003c\/a\u003e. Where traditional registers interrupt a ceiling with grilles and bars, the 2-slot design integrates cleanly into any flat surface, delivering conditioned air with precision and almost no visual presence.\u003c\/p\u003e\n\u003cp\u003eThe 2-slot configuration is the residential standard. Industry consensus places 3-slot and wider models in commercial applications with higher airflow demands, while the 2-slot serves the moderate, room-by-room loads typical of homes and modern apartments. Green Vent's 2-slot linear diffusers are precision-extruded from premium aluminum alloy, available in matte White and matte Black, with adjustable or fixed-blade options — and all are engineered for straightforward DIY installation.\u003c\/p\u003e\n\u003cp\u003eThis guide covers what the \"2 slot\" designation actually means, why it suits residential spaces, where to mount it, and exactly which Green Vent sizes and types match your project.\u003c\/p\u003e\n\u003ch2\u003eWhat Is a 2 Slot Linear Diffuser?\u003c\/h2\u003e\n\u003cp\u003eA 2 \u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003eslot linear diffuser\u003c\/a\u003e is an HVAC air outlet with exactly two parallel, elongated openings running the full length of the unit face — conditioned air exits the duct and enters the room simultaneously through both slots. The number refers strictly to the slot count on the visible face, not the number of duct connections or the physical length of the unit.\u003c\/p\u003e\n\u003cp\u003eCompared to a \u003ca href=\"https:\/\/www.greenvent.us\/collections\/single-slot-linear-diffuser\"\u003esingle-slot model\u003c\/a\u003e (one discharge row, narrower coverage zone), the 2-slot spreads conditioned air across a wider dual-direction pattern. Compared to \u003ca href=\"https:\/\/www.greenvent.us\/collections\/3-slot-linear-diffuser\"\u003e3-slot\u003c\/a\u003e and larger models (common in commercial ceiling systems), the 2-slot presents a narrower, lighter-profile face that suits residential room proportions without the bulk. Per established HVAC practice, 2-slot linear diffusers are more commonly specified in residential buildings, while 3-slot configurations typically address the higher airflow volumes found in commercial spaces. Green Vent's 2-slot units are precision-extruded from aluminum alloy — not steel, not plastic — giving them natural resistance to rust and corrosion from day one.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"Front view of a 2-slot linear diffuser with arrows and labels marking 'Slot 1' and 'Slot 2' to clearly differentiate the two-slot configuration.\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/2-slot-linear-diffuser-1.jpg?v=1776043531\"\u003e\u003c\/div\u003e\n\u003cp\u003eTwo slots aren't an arbitrary aesthetic choice — the dual configuration directly shapes how air moves through your room.\u003c\/p\u003e\n\u003ch2\u003eWhy the 2-Slot Design Is the Residential Sweet Spot\u003c\/h2\u003e\n\u003cp\u003eTwo slots deliver a balanced, symmetrical dual-direction airflow throw — the right output range for residential room loads without the acoustic intensity or face-width bulk of commercial 3-slot units. The 2-slot configuration sits in the practical middle ground: more capable than a single-slot, more proportionate than anything wider. Two pillars explain why it works so well in homes: its balanced airflow mechanics and its minimalist aesthetic profile.\u003c\/p\u003e\n\u003ch3\u003eBalanced Dual-Throw Airflow Pattern\u003c\/h3\u003e\n\u003cp\u003eA 2-slot diffuser splits conditioned air across two parallel discharge paths, creating a symmetrical throw pattern that covers a wider zone along the ceiling plane compared to a single-slot unit. Each slot works simultaneously, distributing airflow in a balanced left-and-right (or inward-and-outward) spread that reduces concentrated jets and helps even out temperature across the full length of the run.\u003c\/p\u003e\n\u003cp\u003eAdjustable blade models — such as Green Vent's Type L (L-EVG14D) — allow each slot's direction to be set independently, taking advantage of the Coanda effect to keep air attached to the ceiling surface or angled downward toward the occupied zone as needed. This directional flexibility can help eliminate hot and cold spots in rooms where a single-direction throw falls short.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"Side-view diagram of a 2-slot linear diffuser illustrating the Coanda effect, showing airflow adhering to the ceiling and dispersing symmetrically in two directions.\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/2-slot-linear-diffuser-2.jpg?v=1776043551\"\u003e\u003c\/div\u003e\n\u003ch3\u003eClean-Line Aesthetics for Modern Interiors\u003c\/h3\u003e\n\u003cp\u003eThe 2-slot face presents two crisp, parallel lines that integrate flush with any flat ceiling or wall surface, making the vent virtually invisible in modern and minimalist interior schemes. Two narrow slots are far less visually dominant than the louvered grid of a traditional register or the wider faceplate of a 3-slot commercial unit — the diffuser simply disappears into the surface it is mounted in.\u003c\/p\u003e\n\u003cp\u003eGreen Vent's 2-slot units are available in White (Type L) to match or intentionally contrast any contemporary palette. The premium aluminum alloy construction means the finish stays consistent over time — no rust staining, no warping, and none of the paint-chip yellowing that eventually affects steel or plastic alternatives. These diffusers pair naturally with open-plan ceilings, drywall soffits, coffered panels, and feature accent walls.\u003c\/p\u003e\n\u003cp\u003eOnce you understand the performance and look, the next question is exactly where in the room a 2-slot diffuser delivers those benefits.\u003c\/p\u003e\n\u003ch2\u003eCeiling vs. Wall: Where to Place a 2 Slot Linear Diffuser\u003c\/h2\u003e\n\u003cp\u003eA 2-slot linear diffuser can be mounted in a ceiling or a wall, and the correct choice depends on whether the system delivers supply air from above or from a high-sidewall position. Each placement scenario produces a different airflow pattern and serves a different set of room types — both are valid residential applications for Green Vent's 2-slot range.\u003c\/p\u003e\n\u003ch3\u003eCeiling Installation Applications\u003c\/h3\u003e\n\u003cp\u003eMounted in a ceiling, the 2-slot diffuser discharges air horizontally along the ceiling plane using the Coanda effect, ensuring even temperature distribution across the full floor area below. The dual-slot throw spreads conditioned air in both directions along the unit's length, minimizing dead zones in wider rooms.\u003c\/p\u003e\n\u003cp\u003eCeiling placement works well for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOpen-plan living rooms and dining areas with flat or coffered ceilings\u003c\/li\u003e\n\u003cli\u003eMaster bedrooms and guest bedrooms requiring quiet, even-temperature air distribution\u003c\/li\u003e\n\u003cli\u003eHome offices and hallways where a flush ceiling finish is a design priority\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGreen Vent's 2-slot units are compatible with ceiling-mounted plenum boxes, and they support both supply air and \u003ca href=\"https:\/\/www.greenvent.us\/collections\/return-air-vents\"\u003ereturn air applications\u003c\/a\u003e — specify the function at the point of order.\u003c\/p\u003e\n\u003ch3\u003eWall Installation Applications\u003c\/h3\u003e\n\u003cp\u003eInstalled in a high sidewall position, the 2-slot diffuser projects conditioned air horizontally across the room, making it particularly effective for heating-dominant zones where warm air delivery from a wall improves comfort in the occupied zone. The horizontal throw from a high sidewall keeps conditioned air in the breathing zone longer than a downward-angled ceiling supply can in some room configurations.\u003c\/p\u003e\n\u003cp\u003eWall placement works well for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExterior walls and areas below windows where perimeter heating is beneficial\u003c\/li\u003e\n\u003cli\u003eHallway walls and feature accent walls where a narrow aluminum profile fits the design\u003c\/li\u003e\n\u003cli\u003eZones where ceiling access is limited by structural constraints\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGreen Vent's 2-slot units support wall mounting on standard stud-bay duct openings without sheet metal modification.\u003c\/p\u003e\n\u003cp\u003eNow that you know where a 2-slot diffuser belongs in your space, here is exactly what Green Vent offers in this configuration.\u003c\/p\u003e\n\u003ch2\u003eGreen Vent 2 Slot Linear Diffusers — Sizes \u0026amp; Colors\u003c\/h2\u003e\n\u003cp\u003eGreen Vent offers 2-slot linear diffusers in precision-extruded aluminum in two face widths, two finishes, and two functional types, covering the most common residential duct openings. Shopping the range comes down to three decisions: the size that matches your duct rough opening, the finish that suits your interior, and the type — fixed or adjustable — that matches your airflow control needs.\u003c\/p\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cp\u003eGreen Vent's 2-slot linear diffusers are available in four face widths: 6 inches (catalog size 6x4), 8 inches (8x4), 10 inches (10x4), and 12 inches (12x4). In Green Vent's size notation, despite the \"x4\" catalog number, all these models feature exactly 2 slots. These diffusers are exclusively offered in a clean White finish. All sizes come in single packs, while the 10-inch model also offers a convenient 2-pack option.\u003c\/p\u003e\n\u003cp\u003eBoth sizes are available in single packs in White and Black finishes.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; height: 117.614px;\" border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.6023px;\"\u003e\n\u003cth style=\"width: 18.5743%; height: 19.6023px;\"\u003eSize (Catalog)\u003c\/th\u003e\n\u003cth style=\"width: 15.0474%; height: 19.6023px;\"\u003eFace Width\u003c\/th\u003e\n\u003cth style=\"width: 14.2941%; height: 19.6023px;\"\u003eSlot Count\u003c\/th\u003e\n\u003cth style=\"width: 16.409%; height: 19.6023px;\"\u003ePack Option\u003c\/th\u003e\n\u003cth style=\"width: 19.2466%; height: 19.6023px;\"\u003eFinish Options\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6023px;\"\u003e\n\u003ctd style=\"width: 18.5743%; height: 19.6023px;\"\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/6x4-vent-covers\"\u003e6x4\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 15.0474%; height: 19.6023px;\"\u003e6 in.\u003c\/td\u003e\n\u003ctd style=\"width: 14.2941%; height: 19.6023px;\"\u003e2 slots\u003c\/td\u003e\n\u003ctd style=\"width: 16.409%; height: 19.6023px;\"\u003eSingle Pack\u003c\/td\u003e\n\u003ctd style=\"width: 19.2466%; height: 19.6023px;\"\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6023px;\"\u003e\n\u003ctd style=\"width: 18.5743%; height: 19.6023px;\"\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/8x4-vent-covers\"\u003e8x4\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 15.0474%; height: 19.6023px;\"\u003e8 in.\u003c\/td\u003e\n\u003ctd style=\"width: 14.2941%; height: 19.6023px;\"\u003e2 slots\u003c\/td\u003e\n\u003ctd style=\"width: 16.409%; height: 19.6023px;\"\u003eSingle Pack\u003c\/td\u003e\n\u003ctd style=\"width: 19.2466%; height: 19.6023px;\"\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2045px;\"\u003e\n\u003ctd style=\"width: 18.5743%; height: 39.2045px;\"\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/10x4-vent-covers\"\u003e10x4\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 15.0474%; height: 39.2045px;\"\u003e10 in.\u003c\/td\u003e\n\u003ctd style=\"width: 14.2941%; height: 39.2045px;\"\u003e2 slots\u003c\/td\u003e\n\u003ctd style=\"width: 16.409%; height: 39.2045px;\"\u003eSingle Pack, 2 Pack\u003c\/td\u003e\n\u003ctd style=\"width: 19.2466%; height: 39.2045px;\"\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6023px;\"\u003e\n\u003ctd style=\"width: 18.5743%; height: 19.6023px;\"\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/12x4-vent-covers\"\u003e12x4\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 15.0474%; height: 19.6023px;\"\u003e12 in.\u003c\/td\u003e\n\u003ctd style=\"width: 14.2941%; height: 19.6023px;\"\u003e2 slots\u003c\/td\u003e\n\u003ctd style=\"width: 16.409%; height: 19.6023px;\"\u003eSingle Pack\u003c\/td\u003e\n\u003ctd style=\"width: 19.2466%; height: 19.6023px;\"\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"Side-by-side size comparison of 10x4 8x4 and 6x4 2-slot linear diffusers against a white background.\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/2-slot-linear-diffuser-3.jpg?v=1776043566\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eBlack vs. White Finish\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eThe White finish perfectly suits light, neutral, and Scandinavian interiors where the diffuser should seamlessly recede into the ceiling or wall. As the most widely specified finish for residential ceilings, it disappears against standard white drywall and requires no design justification. Crafted with a premium powder-coated aluminum alloy body, it delivers exceptional structural performance and a natural resistance to rust, corrosion, and color degradation over time. This durable finish will never yellow, flake, or stain surrounding paintwork the way painted steel registers eventually do.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eType S (Fixed) vs. Type L (Airflow Controller)\u003c\/h3\u003e\n\u003cp data-path-to-node=\"1\"\u003eIn terms of their sleek exterior design and premium aluminum construction, Type S and Type L are completely identical. The single difference between them lies in the internal structure of their airflow controllers. Both models are equipped with adjustable mechanisms to manage air distribution, but they utilize different configurations.\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003e\u003cb data-path-to-node=\"2\" data-index-in-node=\"0\"\u003eType S\u003c\/b\u003e features a streamlined airflow controller with a simpler internal blade structure within the slot. It allows for essential directional adjustment, providing a consistent throw pattern once set. It is an excellent, straightforward choice for standard supply zones or return air applications where basic directional management is sufficient.\u003c\/p\u003e\n\u003cp data-path-to-node=\"3\"\u003e\u003cb data-path-to-node=\"3\" data-index-in-node=\"0\"\u003eType L\u003c\/b\u003e includes a more advanced, multi-blade adjustable mechanism inside each slot. This intricate configuration provides highly precise, independent control over both the direction and volume of the air discharge. It is the optimal choice for active supply air in zones where seasonal redirection adds maximum comfort value—for example, precisely angling cooling air along the ceiling in summer and directing warm air downward in winter.\u003c\/p\u003e\n\u003cp data-path-to-node=\"4\"\u003eKnowing what's available is step one; choosing the right combination of size and type for your specific room is step two.\u003c\/p\u003e\n\u003ch2\u003eHow to Choose the Right 2 Slot Linear Diffuser\u003c\/h2\u003e\n\u003cp\u003eChoosing the right Green Vent 2-slot diffuser comes down to two decisions: matching the unit face size to your duct opening, and matching the finish and type to your interior design and airflow control needs. Get these two decisions right and the diffuser will perform correctly from day one — and blend into your space exactly as intended.\u003c\/p\u003e\n\u003ch2\u003eHow to Choose the Right 2 Slot Linear Diffuser\u003c\/h2\u003e\n\u003cp\u003eChoosing the right Green Vent 2-slot diffuser comes down to two decisions: matching the unit face size to your duct opening, and matching the finish and type to your interior design and airflow control needs. Get these two decisions right and the diffuser will perform correctly from day one — and blend into your space exactly as intended.\u003c\/p\u003e\n\u003ch3\u003eMatching Duct Opening Size to Diffuser Size\u003c\/h3\u003e\n\u003cp\u003eSelect the diffuser size whose face width spans the duct opening plus enough edge margin to seat the mounting flange flush against the ceiling or wall surface. The face of the diffuser is always larger than the duct rough opening it covers — the flange provides the overlap that creates a clean, sealed edge.\u003c\/p\u003e\n\u003cp\u003eMeasure the duct rough opening first (width × height in inches) before selecting between the 6x4, 8x4, 10x4 and 12x4. Do not select based on room square footage alone — the airflow volume delivered through that specific duct branch is the governing factor, not the size of the room.\u003c\/p\u003e\n\u003ch3\u003eChoosing the Right Finish and Type for Your Interior\u003c\/h3\u003e\n\u003cp\u003eChoose White for standard supply or return air in rooms with light-colored ceilings and walls where the diffuser should blend in; choose Black  for rooms with dark architectural finishes or wherever active seasonal airflow adjustment adds comfort value. White works universally in residential ceilings — nearly invisible against standard white drywall and suitable for any room in the home without additional design consideration.\u003c\/p\u003e\n\u003cp\u003eBlack is a considered design decision — use it intentionally in rooms where the finish complements the existing palette rather than conflicts with it. Type L's adjustable blade controller is the correct functional choice for a bedroom or living room where you want cooling air to hug the ceiling in summer and heating air directed into the occupied zone in winter — regardless of color preference, if directional control matters, Type L is the right model. Note that Black (Type L-EVG14D) is currently available in the L-EVG14D variant — confirm availability for specific sizes with the Green Vent team. With your size, color, and type selected, installation is the final step — and with Green Vent, it is designed to be straightforward.\u003c\/p\u003e\n\u003ch2\u003eInstalling Your Green Vent 2 Slot Linear Diffuser\u003c\/h2\u003e\n\u003cp\u003eGreen Vent 2-slot linear diffusers are engineered for straightforward DIY installation using only basic tools, requiring no specialist HVAC knowledge for a standard duct-opening swap. The lightweight aluminum construction makes ceiling and wall handling manageable for one person — the mounting flange seats over the duct rough opening and is secured with screws that are concealed behind the diffuser face once the unit is in place. No soldering, no sheet metal modification, and no HVAC certification is required for a direct drop-in replacement.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat Does \"2 Slot\" Mean on a Linear Diffuser?\u003c\/h3\u003e\n\u003cp\u003e\"2 slot\" means the diffuser face contains exactly two parallel, elongated air-discharge openings running the full length of the unit — conditioned air exits through both simultaneously. The number refers to the visible slot count on the face only, not the number of duct connections or the physical size of the unit. More slots generally mean a wider face and greater airflow capacity; fewer slots mean a narrower, lower-profile unit. The 2-slot count is the residential standard for this product category.\u003c\/p\u003e\n\u003ch3\u003eIs a 2 Slot Linear Diffuser Better Than a Single Slot Model?\u003c\/h3\u003e\n\u003cp\u003eA 2-slot diffuser delivers greater airflow coverage and a balanced dual-direction throw compared to a single-slot model — making it the better choice for rooms where one slot's throw distance or volume is insufficient. A single-slot model can suit compact zones, closet supply applications, or spaces where the design goal is the absolute minimum visible profile. For most standard residential living spaces, bedrooms, and open-plan areas, the 2-slot is the more capable option while remaining aesthetically minimal. Neither type is universally superior — the right choice depends on the room's airflow requirement and the desired throw pattern.\u003c\/p\u003e\n\u003ch3\u003eCan I Install a 2 Slot Linear Diffuser Myself?\u003c\/h3\u003e\n\u003cp\u003eYes — Green Vent 2-slot linear diffusers are designed for DIY installation and require only a screwdriver for a standard duct-opening replacement. The lightweight aluminum body makes working overhead on a ceiling manageable without a second person. The mounting flange covers the duct rough opening; screws secure it in place, and the diffuser blades conceal the fasteners once the unit is seated. No ductwork modification or HVAC certification is required for a direct swap on an existing opening.\u003c\/p\u003e\n\u003ch3\u003eWhat Sizes Does Green Vent Offer for 2 Slot Linear Diffusers?\u003c\/h3\u003e\n\u003cp\u003eGreen Vent offers 2-slot linear diffusers in two face widths: 6 inches 6x4, 8 inches 8x4, 10 inches 10x4, 12 inches (12x4) , available in both White and Black finishes. Both sizes come in single packs. White corresponds to the fixed-blade model; Black corresponds to the adjustable airflow controller model. These are the only two 2-slot sizes currently in the Green Vent catalog — confirm with the team for any updated additions.\u003c\/p\u003e\n\u003ch3\u003eAre Green Vent 2 Slot Linear Diffusers Rust-Proof?\u003c\/h3\u003e\n\u003cp\u003eYes — Green Vent 2-slot linear diffusers are made from premium aluminum alloy, which is naturally resistant to rust and corrosion without any special treatment or additional coating. Aluminum does not oxidize in the same way steel does — there is no red rust, no flaking, and no rust staining on surrounding painted surfaces over time. The powder-coat finish adds surface protection and keeps the color consistent across the unit's lifespan. These diffusers are suitable for humid environments, including bathrooms and laundry rooms, where steel registers and plastic covers tend to deteriorate quickly.\u003c\/p\u003e","products":[{"product_id":"8x4-aluminum-linear-slot-diffuser","title":"8x4 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening)","description":"\u003cp\u003e⚠️ \u003cstrong\u003eCHECK SIZE BEFORE PURCHASE:\u003c\/strong\u003e This 8x4 linear slot diffuser fits a \u003cstrong\u003e8\" × 4\" duct opening\u003c\/strong\u003e (the hole in your wall, ceiling, or floor — not your old cover face). \u003ca href=\"#gv-sizing-guide\"\u003eSee the full 8x4 sizing guide →\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits a 8\" × 4\" duct opening\u003c\/strong\u003e — measure the hole, not your old cover face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-in surface-mount replacement\u003c\/strong\u003e — no drywall, flooring, or duct modification required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern minimalist slot design\u003c\/strong\u003e for contemporary interiors and cleaner visual lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-resistant, durable, and zero plastic parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall, ceiling, or low-traffic floor compatible\u003c\/strong\u003e — one diffuser, multiple install scenarios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional adjustable airflow\u003c\/strong\u003e — direct air left, right, both ways, or fully closed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTÜV Rheinland tested\u003c\/strong\u003e — lead-free coating, phthalate-free materials, Prop 65 compliant, and corrosion-resistant finish.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDesigned for modern interiors, engineered for comfort\u003c\/h2\u003e\n\u003cp\u003eSwap an old 8\" × 4\" stamped-steel register for a cleaner aluminum diffuser with adjustable, multi-directional airflow. This white surface-mount diffuser installs on walls, ceilings, and low-traffic floors, giving existing duct openings a cleaner, more intentional finish. White finish pairs naturally with white trim, light ceilings, painted walls, Scandinavian interiors, and light wood floors.\u003c\/p\u003e\n\u003ch2\u003eDesigned to upgrade, not to remodel\u003c\/h2\u003e\n\u003cp\u003eA full remodel should not be required just to make a vent look intentional. This surface-mount diffuser upgrades an existing duct opening without cutting into the wall, ceiling, or floor.\u003c\/p\u003e\n\u003cp\u003eInside: heavy-gauge aluminum, a multi-directional adjustable blade system, and a powder-coated finish made for everyday residential use. Outside: a clean slot profile that looks more refined than a bulky stamped grille.\u003c\/p\u003e\n\u003ch2 id=\"gv-sizing-guide\"\u003eSizing Guide — Will a 8x4 fit your space?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Measure the hole in your wall, ceiling, or floor — do not measure your old vent cover.\u003c\/p\u003e\n\u003cp\u003eThis 8x4 aluminum vent cover is designed to fit a standard 8\" × 4\" duct opening (also listed as a 4x8 wall register or 4 x 8 vent cover).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct opening size:\u003c\/strong\u003e 8\" × 4\" (this is what you measure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck size:\u003c\/strong\u003e 7-3\/4\" × 3-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall face size:\u003c\/strong\u003e 9-3\/4\" × 5-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign note:\u003c\/strong\u003e Like all linear slot diffusers, this model has a narrower face panel than many traditional louvered grilles to achieve a cleaner, minimal aesthetic. It may not fully conceal the unpainted area left by an old AC vent cover — a light paint touch-up may be needed for a perfectly finished look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuick check:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove your existing vent cover.\u003c\/li\u003e\n\u003cli\u003eMeasure the \u003cem\u003eopening\u003c\/em\u003e in the wall, ceiling, or floor — not the old cover.\u003c\/li\u003e\n\u003cli\u003eIf the opening is approximately 8\" × 4\", this 8x4 linear slot diffuser fits.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eDesigned for modern homes\u003c\/h2\u003e\n\u003cp\u003eThe 8x4 size is a practical fit for tighter rectangular openings in bedrooms, hallways, bathrooms, built-ins, and older homes where a traditional grille can feel visually heavy. It gives the space a cleaner slot line while staying easy to install as a direct replacement.\u003c\/p\u003e\n\u003ch3\u003eOn the wall\u003c\/h3\u003e\n\u003cp\u003eReplaces dated stamped-steel grilles in bedrooms, hallways, bathrooms, built-ins, and narrow wall openings. The clean slot line helps the HVAC opening blend into the room instead of becoming a visual distraction.\u003c\/p\u003e\n\u003ch3\u003eOn the ceiling\u003c\/h3\u003e\n\u003cp\u003eCreates a low-profile look for finished ceilings, modern condos, kitchens, bathrooms, and basements. Use the included screws for a secure wall or ceiling installation.\u003c\/p\u003e\n\u003ch3\u003eOn the floor\u003c\/h3\u003e\n\u003cp\u003eWorks in low-traffic floor areas where a modern register-style look is preferred. For busy walkways or heavy foot traffic, choose a heavier-duty floor register.\u003c\/p\u003e\n\u003ch2\u003ePremium Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable aluminum body:\u003c\/strong\u003e Built from aluminum for a lightweight but solid feel, with a finish designed for long-term residential use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimalist linear face:\u003c\/strong\u003e The clean slot pattern replaces bulky louvered grilles with a more intentional architectural look.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional damper:\u003c\/strong\u003e Fine-tune comfort by adjusting airflow direction without replacing the unit or modifying the duct.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy-care finish:\u003c\/strong\u003e The coated surface can be wiped down with a damp cloth and supports a cleaner look over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested Safe for Your Home:\u003c\/strong\u003e Independently tested by TÜV Rheinland across 4 safety standards — lead-free surface coating, phthalate-free materials, free of PBT toxic chemicals, and corrosion-resistant finish per ASTM B117 salt spray standard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e5-Minute Retrofit Installation\u003c\/h2\u003e\n\u003cp\u003eDesigned as a direct replacement for standard 8\" × 4\" duct openings with no structural modification required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Walls \u0026amp; Ceilings:\u003c\/strong\u003e Mounts with the included screws through pre-drilled hidden side holes. Only a screwdriver and the included adjustment tool are needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Floors:\u003c\/strong\u003e Drop the cover into the existing opening in low-traffic areas. Optional screws may be used for extra hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Removable:\u003c\/strong\u003e The diffuser can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe loading=\"lazy\" title=\"Installation guide — Green Vent 8x4 aluminum linear slot diffuser\" src=\"https:\/\/www.youtube.com\/embed\/2NETJ1EgEis\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum Linear Slot Diffuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8\" × 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7-3\/4\" × 3-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Face Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9-3\/4\" × 5-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite \/ Powder-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlloy Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation \/ Mounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew-In for wall\/ceiling; drop-in for low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAirflow Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-directional adjustable: left \/ right \/ both \/ closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupply air, return air, low-traffic floor register use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Surfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall, ceiling, low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVietnam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAdjustable air diffuser bar, Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. What size do I order — 8x4 or face size?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrder by duct opening size. 8x4 means a 8\" × 4\" duct opening—the hole in your wall, ceiling, or floor. The visible face size of this diffuser is 9-3\/4\" × 5-3\/4\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Is a linear slot diffuser better for modern interiors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor contemporary rooms, yes. The straight slot profile looks cleaner than stamped louvers and pairs well with minimalist walls, ceilings, hardwood floors, and modern trim details.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Can I install this 8x4 vent cover on a ceiling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This 8x4 linear slot diffuser can be installed on walls, ceilings, or low-traffic floors as long as the duct opening measures 8\" × 4\". Use the included screws for wall and ceiling installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Does it include an adjustable airflow damper?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The built-in adjustment bar lets you direct airflow left, right, evenly to both sides, or fully close the blades to reduce airflow into unused rooms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Can this diffuser be used for both supply and return air?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt can be used for supply air and many residential return openings. For high-volume returns or filtration needs, choose a dedicated Green Vent air return grille with pre-filter instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6. Can I use a filter with this linear slot diffuser?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Standard filters should not be placed behind individual vent covers because they can restrict airflow and strain the HVAC system. Use a return grille with a pre-filter if filtration at the vent is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. Is the finish paintable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The powder-coated finish is durable as shipped, but it can be lightly sanded, primed, and painted with standard spray paint for custom color matching.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8. Can this be installed outdoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, in sheltered locations such as covered patios, garages, and enclosed porches. It is not intended for direct rain exposure.\u003c\/p\u003e\n\u003ch2\u003eExplore related Green Vent products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/8x4-black-aluminum-linear-slot-diffuser\"\u003e8x4 black aluminum linear slot diffuser\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/8x4-vent-covers\"\u003e8x4 vent covers collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/white-linear-slot-diffusers\"\u003ewhite linear slot diffusers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003elinear slot diffuser collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/air-vent-covers\"\u003emodern air vent covers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot sure about size or finish? Contact Green Vent support before ordering and we will help you choose the right vent cover for your space.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"eager\" alt=\"Green Vent 10x6 aluminum linear slot diffuser in white powder-coated finish, front view\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Side angled view of 10x6 white linear slot diffuser showing extruded aluminum profile and slot depth\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_2.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 linear slot diffuser installed on white wall in modern living room\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_3.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 aluminum vent cover mounted on ceiling above contemporary kitchen island\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_4.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 white vent cover installed flush on hardwood floor near baseboard\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_5.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hand measuring 10 inch by 6 inch duct opening with tape measure for sizing reference\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_6.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Diagram showing duct opening 10 by 6 inches and overall face size 11.75 by 7.75 inches\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_7.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Step-by-step retrofit installation of 10x6 aluminum linear slot diffuser on drywall\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_8.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Close-up of multi-directional adjustable airflow blade on 10x6 linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_9.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hidden side-screw mounting detail on 10x6 white aluminum vent cover\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_10.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"What is in the box - 10x6 linear slot diffuser, mounting screws, and blade adjustment tool\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_11.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"TÜV Rheinland tested certification badge for Green Vent 10x6 aluminum linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_12.jpg?v=1778639719\"\u003e\u003c\/p\u003e","brand":"GREEN VENT","offers":[{"title":"Default Title","offer_id":52347636547956,"sku":"GV.DLS.084N","price":27.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/aluminum-white-linear-slot-diffuser-8x4-modern-air-vent-cover.webp?v=1769735434"},{"product_id":"10x4-aluminum-linear-slot-diffuser","title":"10x4 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening)","description":"\u003cp\u003e⚠️ \u003cstrong\u003eCHECK SIZE BEFORE PURCHASE:\u003c\/strong\u003e This 10x4 linear slot diffuser fits a \u003cstrong\u003e10\" × 4\" duct opening\u003c\/strong\u003e (the hole in your wall, ceiling, or floor — not your old cover face). \u003ca href=\"#gv-sizing-guide\"\u003eSee the full 10x4 sizing guide →\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits a 10\" × 4\" duct opening\u003c\/strong\u003e — measure the hole, not your old cover face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-in surface-mount replacement\u003c\/strong\u003e — no drywall, flooring, or duct modification required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern minimalist slot design\u003c\/strong\u003e for contemporary interiors and cleaner visual lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-resistant, durable, and zero plastic parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall, ceiling, or low-traffic floor compatible\u003c\/strong\u003e — one diffuser, multiple install scenarios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional adjustable airflow\u003c\/strong\u003e — direct air left, right, both ways, or fully closed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTÜV Rheinland tested\u003c\/strong\u003e — lead-free coating, phthalate-free materials, Prop 65 compliant, and corrosion-resistant finish.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDesigned for modern interiors, engineered for comfort\u003c\/h2\u003e\n\u003cp\u003eGive your 10\" × 4\" vent opening a contemporary finish with a durable aluminum linear slot diffuser—no remodeling required. This white surface-mount diffuser installs on walls, ceilings, and low-traffic floors, giving existing duct openings a cleaner, more intentional finish. White finish pairs naturally with white trim, light ceilings, painted walls, Scandinavian interiors, and light wood floors.\u003c\/p\u003e\n\u003ch2\u003eDesigned to upgrade, not to remodel\u003c\/h2\u003e\n\u003cp\u003eFor homeowners who want a modern look without contractor work, this diffuser is a practical replacement path. It covers the duct opening with a clean slot profile and installs with basic tools.\u003c\/p\u003e\n\u003cp\u003eInside: heavy-gauge aluminum, a multi-directional adjustable blade system, and a powder-coated finish made for everyday residential use. Outside: a clean slot profile that looks more refined than a bulky stamped grille.\u003c\/p\u003e\n\u003ch2 id=\"gv-sizing-guide\"\u003eSizing Guide — Will a 10x4 fit your space?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Measure the hole in your wall, ceiling, or floor — do not measure your old vent cover.\u003c\/p\u003e\n\u003cp\u003eThis 10x4 aluminum vent cover is designed to fit a standard 10\" × 4\" duct opening (also listed as a 4x10 wall register or 4 x 10 vent cover).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct opening size:\u003c\/strong\u003e 10\" × 4\" (this is what you measure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck size:\u003c\/strong\u003e 9-3\/4\" × 3-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall face size:\u003c\/strong\u003e 11-3\/4\" × 5-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign note:\u003c\/strong\u003e Like all linear slot diffusers, this model has a narrower face panel than many traditional louvered grilles to achieve a cleaner, minimal aesthetic. It may not fully conceal the unpainted area left by an old AC vent cover — a light paint touch-up may be needed for a perfectly finished look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuick check:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove your existing vent cover.\u003c\/li\u003e\n\u003cli\u003eMeasure the \u003cem\u003eopening\u003c\/em\u003e in the wall, ceiling, or floor — not the old cover.\u003c\/li\u003e\n\u003cli\u003eIf the opening is approximately 10\" × 4\", this 10x4 linear slot diffuser fits.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eDesigned for modern homes\u003c\/h2\u003e\n\u003cp\u003eThe 10x4 size is one of the most useful narrow rectangular formats for bedrooms, hallways, home offices, and older supply runs near walls or baseboards. It gives a dated 4-inch-tall register a cleaner modern profile without making the vent feel oversized.\u003c\/p\u003e\n\u003ch3\u003eOn the wall\u003c\/h3\u003e\n\u003cp\u003eReplaces dated stamped-steel grilles in bedrooms, hallways, home offices, and narrow residential supply runs. The clean slot line helps the HVAC opening blend into the room instead of becoming a visual distraction.\u003c\/p\u003e\n\u003ch3\u003eOn the ceiling\u003c\/h3\u003e\n\u003cp\u003eCreates a low-profile look for finished ceilings, modern condos, kitchens, bathrooms, and basements. Use the included screws for a secure wall or ceiling installation.\u003c\/p\u003e\n\u003ch3\u003eOn the floor\u003c\/h3\u003e\n\u003cp\u003eWorks in low-traffic floor areas where a modern register-style look is preferred. For busy walkways or heavy foot traffic, choose a heavier-duty floor register.\u003c\/p\u003e\n\u003ch2\u003ePremium Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable aluminum body:\u003c\/strong\u003e Built from aluminum for a lightweight but solid feel, with a finish designed for long-term residential use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimalist linear face:\u003c\/strong\u003e The clean slot pattern replaces bulky louvered grilles with a more intentional architectural look.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional damper:\u003c\/strong\u003e Fine-tune comfort by adjusting airflow direction without replacing the unit or modifying the duct.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy-care finish:\u003c\/strong\u003e The coated surface can be wiped down with a damp cloth and supports a cleaner look over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested Safe for Your Home:\u003c\/strong\u003e Independently tested by TÜV Rheinland across 4 safety standards — lead-free surface coating, phthalate-free materials, free of PBT toxic chemicals, and corrosion-resistant finish per ASTM B117 salt spray standard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e5-Minute Retrofit Installation\u003c\/h2\u003e\n\u003cp\u003eDesigned as a direct replacement for standard 10\" × 4\" duct openings with no structural modification required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Walls \u0026amp; Ceilings:\u003c\/strong\u003e Mounts with the included screws through pre-drilled hidden side holes. Only a screwdriver and the included adjustment tool are needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Floors:\u003c\/strong\u003e Drop the cover into the existing opening in low-traffic areas. Optional screws may be used for extra hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Removable:\u003c\/strong\u003e The diffuser can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe loading=\"lazy\" title=\"Installation guide — Green Vent 10x4 aluminum linear slot diffuser\" src=\"https:\/\/www.youtube.com\/embed\/2NETJ1EgEis\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum Linear Slot Diffuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\" × 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9-3\/4\" × 3-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Face Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e11-3\/4\" × 5-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite \/ Powder-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlloy Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation \/ Mounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew-In for wall\/ceiling; drop-in for low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAirflow Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-directional adjustable: left \/ right \/ both \/ closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupply air, return air, low-traffic floor register use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Surfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall, ceiling, low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVietnam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAdjustable air diffuser bar, Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. What size do I order — 10x4 or face size?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrder by duct opening size. 10x4 means a 10\" × 4\" duct opening—the hole in your wall, ceiling, or floor. The visible face size of this diffuser is 11-3\/4\" × 5-3\/4\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Why choose a linear slot diffuser instead of a standard grille?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA standard grille is usually more visible and traditional. A linear slot diffuser creates a cleaner architectural line while still giving you airflow adjustment for everyday comfort.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Can I install this 10x4 vent cover on a ceiling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This 10x4 linear slot diffuser can be installed on walls, ceilings, or low-traffic floors as long as the duct opening measures 10\" × 4\". Use the included screws for wall and ceiling installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Does it include an adjustable airflow damper?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The built-in adjustment bar lets you direct airflow left, right, evenly to both sides, or fully close the blades to reduce airflow into unused rooms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Can this diffuser be used for both supply and return air?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt can be used for supply air and many residential return openings. For high-volume returns or filtration needs, choose a dedicated \u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-air-return-grille-pre-filter\"\u003e10x4 air return grille with pre-filter\u003c\/a\u003e instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6. Can I use a filter with this linear slot diffuser?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Standard filters should not be placed behind individual vent covers because they can restrict airflow and strain the HVAC system. Use a return grille with a pre-filter if filtration at the vent is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. Is the finish paintable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The powder-coated finish is durable as shipped, but it can be lightly sanded, primed, and painted with standard spray paint for custom color matching.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8. Can this be installed outdoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, in sheltered locations such as covered patios, garages, and enclosed porches. It is not intended for direct rain exposure.\u003c\/p\u003e\n\u003ch2\u003eExplore related Green Vent products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-black-aluminum-linear-slot-diffuser\"\u003e10x4 black aluminum linear slot diffuser\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-air-return-grille-pre-filter\"\u003e10x4 air return grille with pre-filter\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/10x4-vent-covers\"\u003e10x4 vent covers collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/white-linear-slot-diffusers\"\u003ewhite linear slot diffusers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003elinear slot diffuser collection\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFor multi-room projects, standardize by duct opening size and finish so the vents look consistent across the home.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"eager\" alt=\"Green Vent 10x6 aluminum linear slot diffuser in white powder-coated finish, front view\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Side angled view of 10x6 white linear slot diffuser showing extruded aluminum profile and slot depth\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_2.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 linear slot diffuser installed on white wall in modern living room\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_3.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 aluminum vent cover mounted on ceiling above contemporary kitchen island\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_4.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 white vent cover installed flush on hardwood floor near baseboard\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_5.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hand measuring 10 inch by 6 inch duct opening with tape measure for sizing reference\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_6.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Diagram showing duct opening 10 by 6 inches and overall face size 11.75 by 7.75 inches\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_7.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Step-by-step retrofit installation of 10x6 aluminum linear slot diffuser on drywall\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_8.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Close-up of multi-directional adjustable airflow blade on 10x6 linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_9.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hidden side-screw mounting detail on 10x6 white aluminum vent cover\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_10.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"What is in the box - 10x6 linear slot diffuser, mounting screws, and blade adjustment tool\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_11.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"TÜV Rheinland tested certification badge for Green Vent 10x6 aluminum linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_12.jpg?v=1778639719\"\u003e\u003c\/p\u003e","brand":"GREEN VENT","offers":[{"title":"Default Title","offer_id":52347640775028,"sku":"GV.DLS.104N","price":29.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/aluminum-white-linear-slot-diffuser-10x4-modern-air-vent-cover.webp?v=1769735223"},{"product_id":"10x4-pack-2-aluminum-linear-slot-diffuser","title":"Pack 2 - 10x4 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening)","description":"\u003cp\u003e⚠️ \u003cstrong\u003eCHECK SIZE BEFORE PURCHASE:\u003c\/strong\u003e This 10x4 linear slot diffuser fits a \u003cstrong\u003e10\" × 4\" duct opening\u003c\/strong\u003e (the hole in your wall, ceiling, or floor — not your old cover face). \u003ca href=\"#gv-sizing-guide\"\u003eSee the full 10x4 sizing guide →\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits a 10\" × 4\" duct opening\u003c\/strong\u003e — measure the hole, not your old cover face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-pack format\u003c\/strong\u003e — ideal for matching paired vents or updating two rooms with one consistent finish.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-in surface-mount replacement\u003c\/strong\u003e — no drywall, flooring, or duct modification required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern minimalist slot design\u003c\/strong\u003e for contemporary interiors and cleaner visual lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-resistant, durable, and zero plastic parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall, ceiling, or low-traffic floor compatible\u003c\/strong\u003e — one diffuser, multiple install scenarios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional adjustable airflow\u003c\/strong\u003e — direct air left, right, both ways, or fully closed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTÜV Rheinland tested\u003c\/strong\u003e — lead-free coating, phthalate-free materials, Prop 65 compliant, and corrosion-resistant finish.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDesigned for modern interiors, engineered for comfort\u003c\/h2\u003e\n\u003cp\u003eReplace your dated 10\" × 4\" louvered grille with a modern aluminum linear slot diffuser designed for clean architectural lines. This white surface-mount diffuser installs on walls, ceilings, and low-traffic floors, giving existing duct openings a cleaner, more intentional finish. White finish pairs naturally with white trim, light ceilings, painted walls, Scandinavian interiors, and light wood floors. This 2-pack is designed for matching vents in the same room, paired openings, or multi-room replacement projects.\u003c\/p\u003e\n\u003ch2\u003eDesigned to upgrade, not to remodel\u003c\/h2\u003e\n\u003cp\u003eA full remodel should not be required just to make a vent look intentional. This surface-mount diffuser upgrades an existing duct opening without cutting into the wall, ceiling, or floor.\u003c\/p\u003e\n\u003cp\u003eInside: heavy-gauge aluminum, a multi-directional adjustable blade system, and a powder-coated finish made for everyday residential use. Outside: a clean slot profile that looks more refined than a bulky stamped grille.\u003c\/p\u003e\n\u003ch2 id=\"gv-sizing-guide\"\u003eSizing Guide — Will a 10x4 fit your space?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Measure the hole in your wall, ceiling, or floor — do not measure your old vent cover.\u003c\/p\u003e\n\u003cp\u003eThis 10x4 aluminum vent cover is designed to fit a standard 10\" × 4\" duct opening (also listed as a 4x10 wall register or 4 x 10 vent cover).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct opening size:\u003c\/strong\u003e 10\" × 4\" (this is what you measure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck size:\u003c\/strong\u003e 9-3\/4\" × 3-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall face size:\u003c\/strong\u003e 11-3\/4\" × 5-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign note:\u003c\/strong\u003e Like all linear slot diffusers, this model has a narrower face panel than many traditional louvered grilles to achieve a cleaner, minimal aesthetic. It may not fully conceal the unpainted area left by an old AC vent cover — a light paint touch-up may be needed for a perfectly finished look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuick check:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove your existing vent cover.\u003c\/li\u003e\n\u003cli\u003eMeasure the \u003cem\u003eopening\u003c\/em\u003e in the wall, ceiling, or floor — not the old cover.\u003c\/li\u003e\n\u003cli\u003eIf the opening is approximately 10\" × 4\", this 10x4 linear slot diffuser fits.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eDesigned for modern homes\u003c\/h2\u003e\n\u003cp\u003eThe 10x4 size is one of the most useful narrow rectangular formats for bedrooms, hallways, home offices, and older supply runs near walls or baseboards. It gives a dated 4-inch-tall register a cleaner modern profile without making the vent feel oversized.\u003c\/p\u003e\n\u003ch3\u003eOn the wall\u003c\/h3\u003e\n\u003cp\u003eReplaces dated stamped-steel grilles in bedrooms, hallways, home offices, and narrow residential supply runs. The clean slot line helps the HVAC opening blend into the room instead of becoming a visual distraction.\u003c\/p\u003e\n\u003ch3\u003eOn the ceiling\u003c\/h3\u003e\n\u003cp\u003eCreates a low-profile look for finished ceilings, modern condos, kitchens, bathrooms, and basements. Use the included screws for a secure wall or ceiling installation.\u003c\/p\u003e\n\u003ch3\u003eOn the floor\u003c\/h3\u003e\n\u003cp\u003eWorks in low-traffic floor areas where a modern register-style look is preferred. For busy walkways or heavy foot traffic, choose a heavier-duty floor register.\u003c\/p\u003e\n\u003ch2\u003ePremium Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable aluminum body:\u003c\/strong\u003e Built from aluminum for a lightweight but solid feel, with a finish designed for long-term residential use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimalist linear face:\u003c\/strong\u003e The clean slot pattern replaces bulky louvered grilles with a more intentional architectural look.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional damper:\u003c\/strong\u003e Fine-tune comfort by adjusting airflow direction without replacing the unit or modifying the duct.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy-care finish:\u003c\/strong\u003e The coated surface can be wiped down with a damp cloth and supports a cleaner look over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested Safe for Your Home:\u003c\/strong\u003e Independently tested by TÜV Rheinland across 4 safety standards — lead-free surface coating, phthalate-free materials, free of PBT toxic chemicals, and corrosion-resistant finish per ASTM B117 salt spray standard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e5-Minute Retrofit Installation\u003c\/h2\u003e\n\u003cp\u003eDesigned as a direct replacement for standard 10\" × 4\" duct openings with no structural modification required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Walls \u0026amp; Ceilings:\u003c\/strong\u003e Mounts with the included screws through pre-drilled hidden side holes. Only a screwdriver and the included adjustment tool are needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Floors:\u003c\/strong\u003e Drop the cover into the existing opening in low-traffic areas. Optional screws may be used for extra hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Removable:\u003c\/strong\u003e The diffuser can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe loading=\"lazy\" title=\"Installation guide — Green Vent 10x4 aluminum linear slot diffuser\" src=\"https:\/\/www.youtube.com\/embed\/2NETJ1EgEis\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum Linear Slot Diffuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\" × 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9-3\/4\" × 3-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Face Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e11-3\/4\" × 5-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite \/ Powder-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlloy Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation \/ Mounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew-In for wall\/ceiling; drop-in for low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAirflow Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-directional adjustable: left \/ right \/ both \/ closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupply air, return air, low-traffic floor register use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Surfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall, ceiling, low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVietnam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAdjustable air diffuser bar, Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. What size do I order — 10x4 or face size?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrder by duct opening size. 10x4 means a 10\" × 4\" duct opening—the hole in your wall, ceiling, or floor. The visible face size of this diffuser is 11-3\/4\" × 5-3\/4\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Why choose a linear slot diffuser instead of a standard grille?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA standard grille is usually more visible and traditional. A linear slot diffuser creates a cleaner architectural line while still giving you airflow adjustment for everyday comfort.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Can I install this 10x4 vent cover on a ceiling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This 10x4 linear slot diffuser can be installed on walls, ceilings, or low-traffic floors as long as the duct opening measures 10\" × 4\". Use the included screws for wall and ceiling installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Does it include an adjustable airflow damper?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The built-in adjustment bar lets you direct airflow left, right, evenly to both sides, or fully close the blades to reduce airflow into unused rooms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Can this diffuser be used for both supply and return air?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt can be used for supply air and many residential return openings. For high-volume returns or filtration needs, choose a dedicated \u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-air-return-grille-pre-filter\"\u003e10x4 air return grille with pre-filter\u003c\/a\u003e instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6. Can I use a filter with this linear slot diffuser?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Standard filters should not be placed behind individual vent covers because they can restrict airflow and strain the HVAC system. Use a return grille with a pre-filter if filtration at the vent is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. Is the finish paintable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The powder-coated finish is durable as shipped, but it can be lightly sanded, primed, and painted with standard spray paint for custom color matching.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8. Can this be installed outdoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, in sheltered locations such as covered patios, garages, and enclosed porches. It is not intended for direct rain exposure.\u003c\/p\u003e\n\u003ch2\u003eExplore related Green Vent products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-pack-2-black-aluminum-linear-slot-diffuser\"\u003e10x4 black aluminum linear slot diffuser\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-air-return-grille-pre-filter\"\u003e10x4 air return grille with pre-filter\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/10x4-vent-covers\"\u003e10x4 vent covers collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/white-linear-slot-diffusers\"\u003ewhite linear slot diffusers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003elinear slot diffuser collection\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot sure about size or finish? Contact Green Vent support before ordering and we will help you choose the right vent cover for your space.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"eager\" alt=\"Green Vent 10x6 aluminum linear slot diffuser in white powder-coated finish, front view\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Side angled view of 10x6 white linear slot diffuser showing extruded aluminum profile and slot depth\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_2.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 linear slot diffuser installed on white wall in modern living room\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_3.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 aluminum vent cover mounted on ceiling above contemporary kitchen island\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_4.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 white vent cover installed flush on hardwood floor near baseboard\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_5.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hand measuring 10 inch by 6 inch duct opening with tape measure for sizing reference\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_6.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Diagram showing duct opening 10 by 6 inches and overall face size 11.75 by 7.75 inches\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_7.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Step-by-step retrofit installation of 10x6 aluminum linear slot diffuser on drywall\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_8.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Close-up of multi-directional adjustable airflow blade on 10x6 linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_9.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hidden side-screw mounting detail on 10x6 white aluminum vent cover\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_10.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"What is in the box - 10x6 linear slot diffuser, mounting screws, and blade adjustment tool\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_11.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"TÜV Rheinland tested certification badge for Green Vent 10x6 aluminum linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_12.jpg?v=1778639719\"\u003e\u003c\/p\u003e","brand":"GREEN VENT","offers":[{"title":"Default Title","offer_id":52347645952372,"sku":"GV.LSD.104W2P","price":49.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/aluminum-white-linear-slot-diffuser-10x4-pack-2-modern-air-vent-cover.webp?v=1769735139"},{"product_id":"12x4-aluminum-linear-slot-diffuser","title":"12x4 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening)","description":"\u003cp\u003e⚠️ \u003cstrong\u003eCHECK SIZE BEFORE PURCHASE:\u003c\/strong\u003e This 12x4 linear slot diffuser fits a \u003cstrong\u003e12\" × 4\" duct opening\u003c\/strong\u003e (the hole in your wall, ceiling, or floor — not your old cover face). \u003ca href=\"#gv-sizing-guide\"\u003eSee the full 12x4 sizing guide →\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits a 12\" × 4\" duct opening\u003c\/strong\u003e — measure the hole, not your old cover face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-in surface-mount replacement\u003c\/strong\u003e — no drywall, flooring, or duct modification required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern minimalist slot design\u003c\/strong\u003e for contemporary interiors and cleaner visual lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-resistant, durable, and zero plastic parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall, ceiling, or low-traffic floor compatible\u003c\/strong\u003e — one diffuser, multiple install scenarios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional adjustable airflow\u003c\/strong\u003e — direct air left, right, both ways, or fully closed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTÜV Rheinland tested\u003c\/strong\u003e — lead-free coating, phthalate-free materials, Prop 65 compliant, and corrosion-resistant finish.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDesigned for modern interiors, engineered for comfort\u003c\/h2\u003e\n\u003cp\u003eSwap an old 12\" × 4\" stamped-steel register for a cleaner aluminum diffuser with adjustable, multi-directional airflow. This white surface-mount diffuser installs on walls, ceilings, and low-traffic floors, giving existing duct openings a cleaner, more intentional finish. White finish pairs naturally with white trim, light ceilings, painted walls, Scandinavian interiors, and light wood floors.\u003c\/p\u003e\n\u003ch2\u003eDesigned to upgrade, not to remodel\u003c\/h2\u003e\n\u003cp\u003eThis is a replacement-first diffuser, not a construction-only vent. It is designed to sit over an existing opening and deliver a cleaner finish with less visual clutter than a traditional grille.\u003c\/p\u003e\n\u003cp\u003eInside: heavy-gauge aluminum, a multi-directional adjustable blade system, and a powder-coated finish made for everyday residential use. Outside: a clean slot profile that looks more refined than a bulky stamped grille.\u003c\/p\u003e\n\u003ch2 id=\"gv-sizing-guide\"\u003eSizing Guide — Will a 12x4 fit your space?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Measure the hole in your wall, ceiling, or floor — do not measure your old vent cover.\u003c\/p\u003e\n\u003cp\u003eThis 12x4 aluminum vent cover is designed to fit a standard 12\" × 4\" duct opening (also listed as a 4x12 wall register or 4 x 12 vent cover).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct opening size:\u003c\/strong\u003e 12\" × 4\" (this is what you measure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck size:\u003c\/strong\u003e 11-3\/4\" × 3-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall face size:\u003c\/strong\u003e 13-3\/4\" × 5-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign note:\u003c\/strong\u003e Like all linear slot diffusers, this model has a narrower face panel than many traditional louvered grilles to achieve a cleaner, minimal aesthetic. It may not fully conceal the unpainted area left by an old AC vent cover — a light paint touch-up may be needed for a perfectly finished look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuick check:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove your existing vent cover.\u003c\/li\u003e\n\u003cli\u003eMeasure the \u003cem\u003eopening\u003c\/em\u003e in the wall, ceiling, or floor — not the old cover.\u003c\/li\u003e\n\u003cli\u003eIf the opening is approximately 12\" × 4\", this 12x4 linear slot diffuser fits.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eDesigned for modern homes\u003c\/h2\u003e\n\u003cp\u003eThe 12x4 size fits long narrow openings in hallways, bedrooms, living rooms, and ceiling runs where a standard grille can look too busy. The linear face turns that opening into a cleaner architectural detail while keeping the installation straightforward.\u003c\/p\u003e\n\u003ch3\u003eOn the wall\u003c\/h3\u003e\n\u003cp\u003eReplaces dated stamped-steel grilles in hallways, bedrooms, living rooms, and long ceiling or wall runs. The clean slot line helps the HVAC opening blend into the room instead of becoming a visual distraction.\u003c\/p\u003e\n\u003ch3\u003eOn the ceiling\u003c\/h3\u003e\n\u003cp\u003eCreates a low-profile look for finished ceilings, modern condos, kitchens, bathrooms, and basements. Use the included screws for a secure wall or ceiling installation.\u003c\/p\u003e\n\u003ch3\u003eOn the floor\u003c\/h3\u003e\n\u003cp\u003eWorks in low-traffic floor areas where a modern register-style look is preferred. For busy walkways or heavy foot traffic, choose a heavier-duty floor register.\u003c\/p\u003e\n\u003ch2\u003ePremium Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo-plastic construction:\u003c\/strong\u003e Aluminum construction gives the diffuser a more premium feel than plastic covers and helps prevent cracking or yellowing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern surface-mount design:\u003c\/strong\u003e The face sits cleanly over the duct opening, making it ideal for retrofit projects and design upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComfort-focused airflow:\u003c\/strong\u003e The adjustable blade system helps distribute conditioned air more evenly across the room.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable and removable:\u003c\/strong\u003e The unit can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested Safe for Your Home:\u003c\/strong\u003e Independently tested by TÜV Rheinland across 4 safety standards — lead-free surface coating, phthalate-free materials, free of PBT toxic chemicals, and corrosion-resistant finish per ASTM B117 salt spray standard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e5-Minute Retrofit Installation\u003c\/h2\u003e\n\u003cp\u003eDesigned as a direct replacement for standard 12\" × 4\" duct openings with no structural modification required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Walls \u0026amp; Ceilings:\u003c\/strong\u003e Mounts with the included screws through pre-drilled hidden side holes. Only a screwdriver and the included adjustment tool are needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Floors:\u003c\/strong\u003e Drop the cover into the existing opening in low-traffic areas. Optional screws may be used for extra hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Removable:\u003c\/strong\u003e The diffuser can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe loading=\"lazy\" title=\"Installation guide — Green Vent 12x4 aluminum linear slot diffuser\" src=\"https:\/\/www.youtube.com\/embed\/2NETJ1EgEis\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum Linear Slot Diffuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12\" × 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e11-3\/4\" × 3-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Face Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e13-3\/4\" × 5-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite \/ Powder-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlloy Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation \/ Mounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew-In for wall\/ceiling; drop-in for low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAirflow Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-directional adjustable: left \/ right \/ both \/ closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupply air, return air, low-traffic floor register use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Surfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall, ceiling, low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVietnam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAdjustable air diffuser bar, Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. What size do I order — 12x4 or face size?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrder by duct opening size. 12x4 means a 12\" × 4\" duct opening—the hole in your wall, ceiling, or floor. The visible face size of this diffuser is 13-3\/4\" × 5-3\/4\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. What is the difference between a linear slot diffuser and a regular vent cover?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA linear slot diffuser moves air through a clean continuous slot instead of a visible louvered face. The result is a more modern look and a smoother airflow pattern for residential supply or return openings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Can I install this 12x4 vent cover on a ceiling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This 12x4 linear slot diffuser can be installed on walls, ceilings, or low-traffic floors as long as the duct opening measures 12\" × 4\". Use the included screws for wall and ceiling installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Does it include an adjustable airflow damper?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The built-in adjustment bar lets you direct airflow left, right, evenly to both sides, or fully close the blades to reduce airflow into unused rooms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Can this diffuser be used for both supply and return air?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt can be used for supply air and many residential return openings. For high-volume returns or filtration needs, choose a dedicated Green Vent air return grille with pre-filter instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6. Can I use a filter with this linear slot diffuser?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Standard filters should not be placed behind individual vent covers because they can restrict airflow and strain the HVAC system. Use a return grille with a pre-filter if filtration at the vent is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. Is the finish paintable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The powder-coated finish is durable as shipped, but it can be lightly sanded, primed, and painted with standard spray paint for custom color matching.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8. Can this be installed outdoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, in sheltered locations such as covered patios, garages, and enclosed porches. It is not intended for direct rain exposure.\u003c\/p\u003e\n\u003ch2\u003eExplore related Green Vent products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/12x4-black-aluminum-linear-slot-diffuser\"\u003e12x4 black aluminum linear slot diffuser\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/12x4-vent-covers\"\u003e12x4 vent covers collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/white-linear-slot-diffusers\"\u003ewhite linear slot diffusers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003elinear slot diffuser collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/air-vent-covers\"\u003emodern air vent covers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFor multi-room projects, standardize by duct opening size and finish so the vents look consistent across the home.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"eager\" alt=\"Green Vent 10x6 aluminum linear slot diffuser in white powder-coated finish, front view\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Side angled view of 10x6 white linear slot diffuser showing extruded aluminum profile and slot depth\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_2.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 linear slot diffuser installed on white wall in modern living room\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_3.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 aluminum vent cover mounted on ceiling above contemporary kitchen island\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_4.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 white vent cover installed flush on hardwood floor near baseboard\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_5.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hand measuring 10 inch by 6 inch duct opening with tape measure for sizing reference\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_6.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Diagram showing duct opening 10 by 6 inches and overall face size 11.75 by 7.75 inches\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_7.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Step-by-step retrofit installation of 10x6 aluminum linear slot diffuser on drywall\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_8.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Close-up of multi-directional adjustable airflow blade on 10x6 linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_9.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hidden side-screw mounting detail on 10x6 white aluminum vent cover\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_10.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"What is in the box - 10x6 linear slot diffuser, mounting screws, and blade adjustment tool\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_11.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"TÜV Rheinland tested certification badge for Green Vent 10x6 aluminum linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_12.jpg?v=1778639719\"\u003e\u003c\/p\u003e","brand":"GREEN VENT","offers":[{"title":"Default Title","offer_id":52347647885684,"sku":"GV.DLS.124N","price":31.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/aluminum-white-linear-slot-diffuser-12x4-modern-air-vent-cover.webp?v=1769734601"},{"product_id":"8x4-black-aluminum-linear-slot-diffuser","title":"8x4 Black Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening)","description":"\u003cp\u003e⚠️ \u003cstrong\u003eCHECK SIZE BEFORE PURCHASE:\u003c\/strong\u003e This 8x4 linear slot diffuser fits a \u003cstrong\u003e8\" × 4\" duct opening\u003c\/strong\u003e (the hole in your wall, ceiling, or floor — not your old cover face). \u003ca href=\"#gv-sizing-guide\"\u003eSee the full 8x4 sizing guide →\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits a 8\" × 4\" duct opening\u003c\/strong\u003e — measure the hole, not your old cover face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-in surface-mount replacement\u003c\/strong\u003e — no drywall, flooring, or duct modification required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern minimalist slot design\u003c\/strong\u003e for contemporary interiors and cleaner visual lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-resistant, durable, and zero plastic parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall, ceiling, or low-traffic floor compatible\u003c\/strong\u003e — one diffuser, multiple install scenarios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional adjustable airflow\u003c\/strong\u003e — direct air left, right, both ways, or fully closed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality-built aluminum finish\u003c\/strong\u003e — crafted for residential spaces where durability, clean looks, and everyday usability matter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDesigned for modern interiors, engineered for comfort\u003c\/h2\u003e\n\u003cp\u003eSwap an old 8\" × 4\" stamped-steel register for a cleaner aluminum diffuser with adjustable, multi-directional airflow. This black surface-mount diffuser installs on walls, ceilings, and low-traffic floors, giving existing duct openings a cleaner, more intentional finish. Black finish works well with dark ceilings, industrial-style rooms, accent walls, modern lofts, black lighting fixtures, and contrast-driven interiors.\u003c\/p\u003e\n\u003ch2\u003eDesigned to upgrade, not to remodel\u003c\/h2\u003e\n\u003cp\u003eThis is a replacement-first diffuser, not a construction-only vent. It is designed to sit over an existing opening and deliver a cleaner finish with less visual clutter than a traditional grille.\u003c\/p\u003e\n\u003cp\u003eInside: heavy-gauge aluminum, a multi-directional adjustable blade system, and a powder-coated finish made for everyday residential use. Outside: a clean slot profile that looks more refined than a bulky stamped grille.\u003c\/p\u003e\n\u003ch2 id=\"gv-sizing-guide\"\u003eSizing Guide — Will a 8x4 fit your space?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Measure the hole in your wall, ceiling, or floor — do not measure your old vent cover.\u003c\/p\u003e\n\u003cp\u003eThis 8x4 aluminum vent cover is designed to fit a standard 8\" × 4\" duct opening (also listed as a 4x8 wall register or 4 x 8 vent cover).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct opening size:\u003c\/strong\u003e 8\" × 4\" (this is what you measure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck size:\u003c\/strong\u003e 7-3\/4\" × 3-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall face size:\u003c\/strong\u003e 9-3\/4\" × 5-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign note:\u003c\/strong\u003e Like all linear slot diffusers, this model has a narrower face panel than many traditional louvered grilles to achieve a cleaner, minimal aesthetic. It may not fully conceal the unpainted area left by an old AC vent cover — a light paint touch-up may be needed for a perfectly finished look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuick check:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove your existing vent cover.\u003c\/li\u003e\n\u003cli\u003eMeasure the \u003cem\u003eopening\u003c\/em\u003e in the wall, ceiling, or floor — not the old cover.\u003c\/li\u003e\n\u003cli\u003eIf the opening is approximately 8\" × 4\", this 8x4 linear slot diffuser fits.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eDesigned for modern homes\u003c\/h2\u003e\n\u003cp\u003eThe 8x4 size is a practical fit for tighter rectangular openings in bedrooms, hallways, bathrooms, built-ins, and older homes where a traditional grille can feel visually heavy. It gives the space a cleaner slot line while staying easy to install as a direct replacement.\u003c\/p\u003e\n\u003ch3\u003eOn the wall\u003c\/h3\u003e\n\u003cp\u003eReplaces dated stamped-steel grilles in bedrooms, hallways, bathrooms, built-ins, and narrow wall openings. The clean slot line helps the HVAC opening blend into the room instead of becoming a visual distraction.\u003c\/p\u003e\n\u003ch3\u003eOn the ceiling\u003c\/h3\u003e\n\u003cp\u003eCreates a low-profile look for finished ceilings, modern condos, kitchens, bathrooms, and basements. Use the included screws for a secure wall or ceiling installation.\u003c\/p\u003e\n\u003ch3\u003eOn the floor\u003c\/h3\u003e\n\u003cp\u003eWorks in low-traffic floor areas where a modern register-style look is preferred. For busy walkways or heavy foot traffic, choose a heavier-duty floor register.\u003c\/p\u003e\n\u003ch2\u003ePremium Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable aluminum body:\u003c\/strong\u003e Built from aluminum for a lightweight but solid feel, with a finish designed for long-term residential use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimalist linear face:\u003c\/strong\u003e The clean slot pattern replaces bulky louvered grilles with a more intentional architectural look.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional damper:\u003c\/strong\u003e Fine-tune comfort by adjusting airflow direction without replacing the unit or modifying the duct.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy-care finish:\u003c\/strong\u003e The coated surface can be wiped down with a damp cloth and supports a cleaner look over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for Everyday Residential Use:\u003c\/strong\u003e Designed and crafted in Vietnam with attention to finish quality, durability, and practical usability for U.S. homeowners and contractors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e5-Minute Retrofit Installation\u003c\/h2\u003e\n\u003cp\u003eDesigned as a direct replacement for standard 8\" × 4\" duct openings with no structural modification required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Walls \u0026amp; Ceilings:\u003c\/strong\u003e Mounts with the included screws through pre-drilled hidden side holes. Only a screwdriver and the included adjustment tool are needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Floors:\u003c\/strong\u003e Drop the cover into the existing opening in low-traffic areas. Optional screws may be used for extra hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Removable:\u003c\/strong\u003e The diffuser can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe loading=\"lazy\" title=\"Installation guide — Green Vent 8x4 aluminum linear slot diffuser\" src=\"https:\/\/www.youtube.com\/embed\/2NETJ1EgEis\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum Linear Slot Diffuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8\" × 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7-3\/4\" × 3-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Face Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9-3\/4\" × 5-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack \/ Powder-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlloy Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation \/ Mounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew-In for wall\/ceiling; drop-in for low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAirflow Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-directional adjustable: left \/ right \/ both \/ closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupply air, return air, low-traffic floor register use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Surfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall, ceiling, low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVietnam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. What size do I order — 8x4 or face size?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrder by duct opening size. 8x4 means a 8\" × 4\" duct opening—the hole in your wall, ceiling, or floor. The visible face size of this diffuser is 9-3\/4\" × 5-3\/4\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. What is the difference between a linear slot diffuser and a regular vent cover?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA linear slot diffuser moves air through a clean continuous slot instead of a visible louvered face. The result is a more modern look and a smoother airflow pattern for residential supply or return openings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Can I install this 8x4 vent cover on a ceiling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This 8x4 linear slot diffuser can be installed on walls, ceilings, or low-traffic floors as long as the duct opening measures 8\" × 4\". Use the included screws for wall and ceiling installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Does it include an adjustable airflow damper?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The built-in adjustment bar lets you direct airflow left, right, evenly to both sides, or fully close the blades to reduce airflow into unused rooms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Can this diffuser be used for both supply and return air?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt can be used for supply air and many residential return openings. For high-volume returns or filtration needs, choose a dedicated Green Vent air return grille with pre-filter instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6. Can I use a filter with this linear slot diffuser?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Standard filters should not be placed behind individual vent covers because they can restrict airflow and strain the HVAC system. Use a return grille with a pre-filter if filtration at the vent is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. Is the finish paintable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The powder-coated finish is durable as shipped, but it can be lightly sanded, primed, and painted with standard spray paint for custom color matching.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8. Can this be installed outdoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, in sheltered locations such as covered patios, garages, and enclosed porches. It is not intended for direct rain exposure.\u003c\/p\u003e\n\u003ch2\u003eExplore related Green Vent products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/8x4-aluminum-linear-slot-diffuser\"\u003e8x4 white aluminum linear slot diffuser\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/8x4-vent-covers\"\u003e8x4 vent covers collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/black-linear-slot-diffusers\"\u003eblack linear slot diffusers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003elinear slot diffuser collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/air-vent-covers\"\u003emodern air vent covers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eA clean vent upgrade starts with the right size. Confirm the opening, review the face size, and contact support if anything looks unusual.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"eager\" alt=\"Green Vent 10x6 aluminum linear slot diffuser in white powder-coated finish, front view\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Side angled view of 10x6 white linear slot diffuser showing extruded aluminum profile and slot depth\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_2.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 linear slot diffuser installed on white wall in modern living room\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_3.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 aluminum vent cover mounted on ceiling above contemporary kitchen island\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_4.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 white vent cover installed flush on hardwood floor near baseboard\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_5.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hand measuring 10 inch by 6 inch duct opening with tape measure for sizing reference\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_6.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Diagram showing duct opening 10 by 6 inches and overall face size 11.75 by 7.75 inches\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_7.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Step-by-step retrofit installation of 10x6 aluminum linear slot diffuser on drywall\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_8.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Close-up of multi-directional adjustable airflow blade on 10x6 linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_9.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hidden side-screw mounting detail on 10x6 white aluminum vent cover\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_10.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"What is in the box - 10x6 linear slot diffuser, mounting screws, and blade adjustment tool\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_11.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"TÜV Rheinland tested certification badge for Green Vent 10x6 aluminum linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_12.jpg?v=1778639719\"\u003e\u003c\/p\u003e","brand":"GREEN VENT","offers":[{"title":"Default Title","offer_id":52347844624756,"sku":"GV.DLS.084B","price":27.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/8x4_Den_b563f529-b977-4bd0-8881-d9b43d53de3f.jpg?v=1768957302"},{"product_id":"10x4-black-aluminum-linear-slot-diffuser","title":"10x4 Black Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening)","description":"\u003cp\u003e⚠️ \u003cstrong\u003eCHECK SIZE BEFORE PURCHASE:\u003c\/strong\u003e This 10x4 linear slot diffuser fits a \u003cstrong\u003e10\" × 4\" duct opening\u003c\/strong\u003e (the hole in your wall, ceiling, or floor — not your old cover face). \u003ca href=\"#gv-sizing-guide\"\u003eSee the full 10x4 sizing guide →\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits a 10\" × 4\" duct opening\u003c\/strong\u003e — measure the hole, not your old cover face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-in surface-mount replacement\u003c\/strong\u003e — no drywall, flooring, or duct modification required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern minimalist slot design\u003c\/strong\u003e for contemporary interiors and cleaner visual lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-resistant, durable, and zero plastic parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall, ceiling, or low-traffic floor compatible\u003c\/strong\u003e — one diffuser, multiple install scenarios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional adjustable airflow\u003c\/strong\u003e — direct air left, right, both ways, or fully closed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality-built aluminum finish\u003c\/strong\u003e — crafted for residential spaces where durability, clean looks, and everyday usability matter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDesigned for modern interiors, engineered for comfort\u003c\/h2\u003e\n\u003cp\u003eUpgrade an existing 10\" × 4\" duct opening with a surface-mount aluminum slot diffuser built for modern American homes. This black surface-mount diffuser installs on walls, ceilings, and low-traffic floors, giving existing duct openings a cleaner, more intentional finish. Black finish works well with dark ceilings, industrial-style rooms, accent walls, modern lofts, black lighting fixtures, and contrast-driven interiors.\u003c\/p\u003e\n\u003ch2\u003eDesigned to upgrade, not to remodel\u003c\/h2\u003e\n\u003cp\u003eThis is a replacement-first diffuser, not a construction-only vent. It is designed to sit over an existing opening and deliver a cleaner finish with less visual clutter than a traditional grille.\u003c\/p\u003e\n\u003cp\u003eInside: heavy-gauge aluminum, a multi-directional adjustable blade system, and a powder-coated finish made for everyday residential use. Outside: a clean slot profile that looks more refined than a bulky stamped grille.\u003c\/p\u003e\n\u003ch2 id=\"gv-sizing-guide\"\u003eSizing Guide — Will a 10x4 fit your space?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Measure the hole in your wall, ceiling, or floor — do not measure your old vent cover.\u003c\/p\u003e\n\u003cp\u003eThis 10x4 aluminum vent cover is designed to fit a standard 10\" × 4\" duct opening (also listed as a 4x10 wall register or 4 x 10 vent cover).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct opening size:\u003c\/strong\u003e 10\" × 4\" (this is what you measure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck size:\u003c\/strong\u003e 9-3\/4\" × 3-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall face size:\u003c\/strong\u003e 11-3\/4\" × 5-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign note:\u003c\/strong\u003e Like all linear slot diffusers, this model has a narrower face panel than many traditional louvered grilles to achieve a cleaner, minimal aesthetic. It may not fully conceal the unpainted area left by an old AC vent cover — a light paint touch-up may be needed for a perfectly finished look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuick check:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove your existing vent cover.\u003c\/li\u003e\n\u003cli\u003eMeasure the \u003cem\u003eopening\u003c\/em\u003e in the wall, ceiling, or floor — not the old cover.\u003c\/li\u003e\n\u003cli\u003eIf the opening is approximately 10\" × 4\", this 10x4 linear slot diffuser fits.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eDesigned for modern homes\u003c\/h2\u003e\n\u003cp\u003eThe 10x4 size is one of the most useful narrow rectangular formats for bedrooms, hallways, home offices, and older supply runs near walls or baseboards. It gives a dated 4-inch-tall register a cleaner modern profile without making the vent feel oversized.\u003c\/p\u003e\n\u003ch3\u003eOn the wall\u003c\/h3\u003e\n\u003cp\u003eReplaces dated stamped-steel grilles in bedrooms, hallways, home offices, and narrow residential supply runs. The clean slot line helps the HVAC opening blend into the room instead of becoming a visual distraction.\u003c\/p\u003e\n\u003ch3\u003eOn the ceiling\u003c\/h3\u003e\n\u003cp\u003eCreates a low-profile look for finished ceilings, modern condos, kitchens, bathrooms, and basements. Use the included screws for a secure wall or ceiling installation.\u003c\/p\u003e\n\u003ch3\u003eOn the floor\u003c\/h3\u003e\n\u003cp\u003eWorks in low-traffic floor areas where a modern register-style look is preferred. For busy walkways or heavy foot traffic, choose a heavier-duty floor register.\u003c\/p\u003e\n\u003ch2\u003ePremium Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo-plastic construction:\u003c\/strong\u003e Aluminum construction gives the diffuser a more premium feel than plastic covers and helps prevent cracking or yellowing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern surface-mount design:\u003c\/strong\u003e The face sits cleanly over the duct opening, making it ideal for retrofit projects and design upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComfort-focused airflow:\u003c\/strong\u003e The adjustable blade system helps distribute conditioned air more evenly across the room.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable and removable:\u003c\/strong\u003e The unit can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for Everyday Residential Use:\u003c\/strong\u003e Designed and crafted in Vietnam with attention to finish quality, durability, and practical usability for U.S. homeowners and contractors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e5-Minute Retrofit Installation\u003c\/h2\u003e\n\u003cp\u003eDesigned as a direct replacement for standard 10\" × 4\" duct openings with no structural modification required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Walls \u0026amp; Ceilings:\u003c\/strong\u003e Mounts with the included screws through pre-drilled hidden side holes. Only a screwdriver and the included adjustment tool are needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Floors:\u003c\/strong\u003e Drop the cover into the existing opening in low-traffic areas. Optional screws may be used for extra hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Removable:\u003c\/strong\u003e The diffuser can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe loading=\"lazy\" title=\"Installation guide — Green Vent 10x4 aluminum linear slot diffuser\" src=\"https:\/\/www.youtube.com\/embed\/2NETJ1EgEis\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum Linear Slot Diffuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\" × 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9-3\/4\" × 3-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Face Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e11-3\/4\" × 5-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack \/ Powder-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlloy Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation \/ Mounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew-In for wall\/ceiling; drop-in for low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAirflow Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-directional adjustable: left \/ right \/ both \/ closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupply air, return air, low-traffic floor register use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Surfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall, ceiling, low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVietnam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. What size do I order — 10x4 or face size?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrder by duct opening size. 10x4 means a 10\" × 4\" duct opening—the hole in your wall, ceiling, or floor. The visible face size of this diffuser is 11-3\/4\" × 5-3\/4\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Why choose a linear slot diffuser instead of a standard grille?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA standard grille is usually more visible and traditional. A linear slot diffuser creates a cleaner architectural line while still giving you airflow adjustment for everyday comfort.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Can I install this 10x4 vent cover on a ceiling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This 10x4 linear slot diffuser can be installed on walls, ceilings, or low-traffic floors as long as the duct opening measures 10\" × 4\". Use the included screws for wall and ceiling installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Does it include an adjustable airflow damper?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The built-in adjustment bar lets you direct airflow left, right, evenly to both sides, or fully close the blades to reduce airflow into unused rooms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Can this diffuser be used for both supply and return air?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt can be used for supply air and many residential return openings. For high-volume returns or filtration needs, choose a dedicated \u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-air-return-grille-pre-filter\"\u003e10x4 air return grille with pre-filter\u003c\/a\u003e instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6. Can I use a filter with this linear slot diffuser?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Standard filters should not be placed behind individual vent covers because they can restrict airflow and strain the HVAC system. Use a return grille with a pre-filter if filtration at the vent is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. Is the finish paintable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The powder-coated finish is durable as shipped, but it can be lightly sanded, primed, and painted with standard spray paint for custom color matching.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8. Can this be installed outdoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, in sheltered locations such as covered patios, garages, and enclosed porches. It is not intended for direct rain exposure.\u003c\/p\u003e\n\u003ch2\u003eExplore related Green Vent products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-aluminum-linear-slot-diffuser\"\u003e10x4 white aluminum linear slot diffuser\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-air-return-grille-pre-filter\"\u003e10x4 air return grille with pre-filter\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/10x4-vent-covers\"\u003e10x4 vent covers collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/black-linear-slot-diffusers\"\u003eblack linear slot diffusers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003elinear slot diffuser collection\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot sure about size or finish? Contact Green Vent support before ordering and we will help you choose the right vent cover for your space.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"eager\" alt=\"Green Vent 10x6 aluminum linear slot diffuser in white powder-coated finish, front view\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Side angled view of 10x6 white linear slot diffuser showing extruded aluminum profile and slot depth\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_2.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 linear slot diffuser installed on white wall in modern living room\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_3.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 aluminum vent cover mounted on ceiling above contemporary kitchen island\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_4.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 white vent cover installed flush on hardwood floor near baseboard\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_5.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hand measuring 10 inch by 6 inch duct opening with tape measure for sizing reference\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_6.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Diagram showing duct opening 10 by 6 inches and overall face size 11.75 by 7.75 inches\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_7.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Step-by-step retrofit installation of 10x6 aluminum linear slot diffuser on drywall\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_8.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Close-up of multi-directional adjustable airflow blade on 10x6 linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_9.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hidden side-screw mounting detail on 10x6 white aluminum vent cover\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_10.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"What is in the box - 10x6 linear slot diffuser, mounting screws, and blade adjustment tool\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_11.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"TÜV Rheinland tested certification badge for Green Vent 10x6 aluminum linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_12.jpg?v=1778639719\"\u003e\u003c\/p\u003e","brand":"GREEN VENT","offers":[{"title":"Default Title","offer_id":52347856814452,"sku":"GV.DLS.104B","price":29.43,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/aluminum-matte-black-linear-slot-diffuser-10x4-modern-air-vent-cover.webp?v=1769704289"},{"product_id":"10x4-pack-2-black-aluminum-linear-slot-diffuser","title":"Pack 2 - 10x4 Black Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening)","description":"\u003cp\u003e⚠️ \u003cstrong\u003eCHECK SIZE BEFORE PURCHASE:\u003c\/strong\u003e This 10x4 linear slot diffuser fits a \u003cstrong\u003e10\" × 4\" duct opening\u003c\/strong\u003e (the hole in your wall, ceiling, or floor — not your old cover face). \u003ca href=\"#gv-sizing-guide\"\u003eSee the full 10x4 sizing guide →\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits a 10\" × 4\" duct opening\u003c\/strong\u003e — measure the hole, not your old cover face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-pack format\u003c\/strong\u003e — ideal for matching paired vents or updating two rooms with one consistent finish.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-in surface-mount replacement\u003c\/strong\u003e — no drywall, flooring, or duct modification required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern minimalist slot design\u003c\/strong\u003e for contemporary interiors and cleaner visual lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-resistant, durable, and zero plastic parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall, ceiling, or low-traffic floor compatible\u003c\/strong\u003e — one diffuser, multiple install scenarios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional adjustable airflow\u003c\/strong\u003e — direct air left, right, both ways, or fully closed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality-built aluminum finish\u003c\/strong\u003e — crafted for residential spaces where durability, clean looks, and everyday usability matter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDesigned for modern interiors, engineered for comfort\u003c\/h2\u003e\n\u003cp\u003eUpgrade an existing 10\" × 4\" duct opening with a surface-mount aluminum slot diffuser built for modern American homes. This black surface-mount diffuser installs on walls, ceilings, and low-traffic floors, giving existing duct openings a cleaner, more intentional finish. Black finish works well with dark ceilings, industrial-style rooms, accent walls, modern lofts, black lighting fixtures, and contrast-driven interiors. This 2-pack is designed for matching vents in the same room, paired openings, or multi-room replacement projects.\u003c\/p\u003e\n\u003ch2\u003eDesigned to upgrade, not to remodel\u003c\/h2\u003e\n\u003cp\u003eFor homeowners who want a modern look without contractor work, this diffuser is a practical replacement path. It covers the duct opening with a clean slot profile and installs with basic tools.\u003c\/p\u003e\n\u003cp\u003eInside: heavy-gauge aluminum, a multi-directional adjustable blade system, and a powder-coated finish made for everyday residential use. Outside: a clean slot profile that looks more refined than a bulky stamped grille.\u003c\/p\u003e\n\u003ch2 id=\"gv-sizing-guide\"\u003eSizing Guide — Will a 10x4 fit your space?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Measure the hole in your wall, ceiling, or floor — do not measure your old vent cover.\u003c\/p\u003e\n\u003cp\u003eThis 10x4 aluminum vent cover is designed to fit a standard 10\" × 4\" duct opening (also listed as a 4x10 wall register or 4 x 10 vent cover).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct opening size:\u003c\/strong\u003e 10\" × 4\" (this is what you measure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck size:\u003c\/strong\u003e 9-3\/4\" × 3-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall face size:\u003c\/strong\u003e 11-3\/4\" × 5-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign note:\u003c\/strong\u003e Like all linear slot diffusers, this model has a narrower face panel than many traditional louvered grilles to achieve a cleaner, minimal aesthetic. It may not fully conceal the unpainted area left by an old AC vent cover — a light paint touch-up may be needed for a perfectly finished look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuick check:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove your existing vent cover.\u003c\/li\u003e\n\u003cli\u003eMeasure the \u003cem\u003eopening\u003c\/em\u003e in the wall, ceiling, or floor — not the old cover.\u003c\/li\u003e\n\u003cli\u003eIf the opening is approximately 10\" × 4\", this 10x4 linear slot diffuser fits.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eDesigned for modern homes\u003c\/h2\u003e\n\u003cp\u003eThe 10x4 size is one of the most useful narrow rectangular formats for bedrooms, hallways, home offices, and older supply runs near walls or baseboards. It gives a dated 4-inch-tall register a cleaner modern profile without making the vent feel oversized.\u003c\/p\u003e\n\u003ch3\u003eOn the wall\u003c\/h3\u003e\n\u003cp\u003eReplaces dated stamped-steel grilles in bedrooms, hallways, home offices, and narrow residential supply runs. The clean slot line helps the HVAC opening blend into the room instead of becoming a visual distraction.\u003c\/p\u003e\n\u003ch3\u003eOn the ceiling\u003c\/h3\u003e\n\u003cp\u003eCreates a low-profile look for finished ceilings, modern condos, kitchens, bathrooms, and basements. Use the included screws for a secure wall or ceiling installation.\u003c\/p\u003e\n\u003ch3\u003eOn the floor\u003c\/h3\u003e\n\u003cp\u003eWorks in low-traffic floor areas where a modern register-style look is preferred. For busy walkways or heavy foot traffic, choose a heavier-duty floor register.\u003c\/p\u003e\n\u003ch2\u003ePremium Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo-plastic construction:\u003c\/strong\u003e Aluminum construction gives the diffuser a more premium feel than plastic covers and helps prevent cracking or yellowing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern surface-mount design:\u003c\/strong\u003e The face sits cleanly over the duct opening, making it ideal for retrofit projects and design upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComfort-focused airflow:\u003c\/strong\u003e The adjustable blade system helps distribute conditioned air more evenly across the room.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable and removable:\u003c\/strong\u003e The unit can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for Everyday Residential Use:\u003c\/strong\u003e Designed and crafted in Vietnam with attention to finish quality, durability, and practical usability for U.S. homeowners and contractors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e5-Minute Retrofit Installation\u003c\/h2\u003e\n\u003cp\u003eDesigned as a direct replacement for standard 10\" × 4\" duct openings with no structural modification required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Walls \u0026amp; Ceilings:\u003c\/strong\u003e Mounts with the included screws through pre-drilled hidden side holes. Only a screwdriver and the included adjustment tool are needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Floors:\u003c\/strong\u003e Drop the cover into the existing opening in low-traffic areas. Optional screws may be used for extra hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Removable:\u003c\/strong\u003e The diffuser can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe loading=\"lazy\" title=\"Installation guide — Green Vent 10x4 aluminum linear slot diffuser\" src=\"https:\/\/www.youtube.com\/embed\/2NETJ1EgEis\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum Linear Slot Diffuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\" × 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9-3\/4\" × 3-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Face Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e11-3\/4\" × 5-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack \/ Powder-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlloy Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation \/ Mounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew-In for wall\/ceiling; drop-in for low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAirflow Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-directional adjustable: left \/ right \/ both \/ closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupply air, return air, low-traffic floor register use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Surfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall, ceiling, low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVietnam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. What size do I order — 10x4 or face size?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrder by duct opening size. 10x4 means a 10\" × 4\" duct opening—the hole in your wall, ceiling, or floor. The visible face size of this diffuser is 11-3\/4\" × 5-3\/4\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Is a linear slot diffuser better for modern interiors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor contemporary rooms, yes. The straight slot profile looks cleaner than stamped louvers and pairs well with minimalist walls, ceilings, hardwood floors, and modern trim details.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Can I install this 10x4 vent cover on a ceiling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This 10x4 linear slot diffuser can be installed on walls, ceilings, or low-traffic floors as long as the duct opening measures 10\" × 4\". Use the included screws for wall and ceiling installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Does it include an adjustable airflow damper?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The built-in adjustment bar lets you direct airflow left, right, evenly to both sides, or fully close the blades to reduce airflow into unused rooms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Can this diffuser be used for both supply and return air?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt can be used for supply air and many residential return openings. For high-volume returns or filtration needs, choose a dedicated \u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-air-return-grille-pre-filter\"\u003e10x4 air return grille with pre-filter\u003c\/a\u003e instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6. Can I use a filter with this linear slot diffuser?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Standard filters should not be placed behind individual vent covers because they can restrict airflow and strain the HVAC system. Use a return grille with a pre-filter if filtration at the vent is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. Is the finish paintable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The powder-coated finish is durable as shipped, but it can be lightly sanded, primed, and painted with standard spray paint for custom color matching.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8. Can this be installed outdoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, in sheltered locations such as covered patios, garages, and enclosed porches. It is not intended for direct rain exposure.\u003c\/p\u003e\n\u003ch2\u003eExplore related Green Vent products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-pack-2-aluminum-linear-slot-diffuser\"\u003e10x4 white aluminum linear slot diffuser\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-air-return-grille-pre-filter\"\u003e10x4 air return grille with pre-filter\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/10x4-vent-covers\"\u003e10x4 vent covers collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/black-linear-slot-diffusers\"\u003eblack linear slot diffusers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003elinear slot diffuser collection\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFor multi-room projects, standardize by duct opening size and finish so the vents look consistent across the home.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"eager\" alt=\"Green Vent 10x6 aluminum linear slot diffuser in white powder-coated finish, front view\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Side angled view of 10x6 white linear slot diffuser showing extruded aluminum profile and slot depth\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_2.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 linear slot diffuser installed on white wall in modern living room\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_3.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 aluminum vent cover mounted on ceiling above contemporary kitchen island\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_4.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 white vent cover installed flush on hardwood floor near baseboard\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_5.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hand measuring 10 inch by 6 inch duct opening with tape measure for sizing reference\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_6.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Diagram showing duct opening 10 by 6 inches and overall face size 11.75 by 7.75 inches\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_7.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Step-by-step retrofit installation of 10x6 aluminum linear slot diffuser on drywall\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_8.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Close-up of multi-directional adjustable airflow blade on 10x6 linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_9.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hidden side-screw mounting detail on 10x6 white aluminum vent cover\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_10.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"What is in the box - 10x6 linear slot diffuser, mounting screws, and blade adjustment tool\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_11.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"TÜV Rheinland tested certification badge for Green Vent 10x6 aluminum linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_12.jpg?v=1778639719\"\u003e\u003c\/p\u003e","brand":"GREEN VENT","offers":[{"title":"Default Title","offer_id":52347863826804,"sku":"GV.DLS.104B2P","price":49.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/aluminum-matte-black-linear-slot-diffuser-10x4-pack-2-modern-air-vent-cover.webp?v=1769704144"},{"product_id":"12x4-black-aluminum-linear-slot-diffuser","title":"12x4 Black Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening)","description":"\u003cp\u003e⚠️ \u003cstrong\u003eCHECK SIZE BEFORE PURCHASE:\u003c\/strong\u003e This 12x4 linear slot diffuser fits a \u003cstrong\u003e12\" × 4\" duct opening\u003c\/strong\u003e (the hole in your wall, ceiling, or floor — not your old cover face).\u003cbr\u003e\u003cstrong\u003eNeck size:\u003c\/strong\u003e 11-3\/4\" × 3-3\/4\". \u003cstrong\u003eOverall face size:\u003c\/strong\u003e 13-3\/4\" × 5-3\/4\". \u003ca href=\"#gv-sizing-guide\"\u003eSee the full 12x4 sizing guide →\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits a 12\" × 4\" duct opening\u003c\/strong\u003e — measure the hole, not your old cover face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-in surface-mount replacement\u003c\/strong\u003e — no drywall, flooring, or duct modification required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern minimalist slot design\u003c\/strong\u003e for contemporary interiors and cleaner visual lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-resistant, durable, and zero plastic parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall, ceiling, or low-traffic floor compatible\u003c\/strong\u003e — one diffuser, multiple install scenarios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional adjustable airflow\u003c\/strong\u003e — direct air left, right, both ways, or fully closed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality-built aluminum finish\u003c\/strong\u003e — crafted for residential spaces where durability, clean looks, and everyday usability matter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDesigned for modern interiors, engineered for comfort\u003c\/h2\u003e\n\u003cp\u003eGive your 12\" × 4\" vent opening a contemporary finish with a durable aluminum linear slot diffuser—no remodeling required. This black surface-mount diffuser installs on walls, ceilings, and low-traffic floors, giving existing duct openings a cleaner, more intentional finish. Black finish works well with dark ceilings, industrial-style rooms, accent walls, modern lofts, black lighting fixtures, and contrast-driven interiors. \u003c\/p\u003e\n\n\u003ch2\u003eDesigned to upgrade, not to remodel\u003c\/h2\u003e\n\u003cp\u003eFor homeowners who want a modern look without contractor work, this diffuser is a practical replacement path. It covers the duct opening with a clean slot profile and installs with basic tools.\u003c\/p\u003e\n\u003cp\u003eInside: heavy-gauge aluminum, a multi-directional adjustable blade system, and a powder-coated finish made for everyday residential use. Outside: a clean slot profile that looks more refined than a bulky stamped grille.\u003c\/p\u003e\n\n\u003ch2 id=\"gv-sizing-guide\"\u003eSizing Guide — Will a 12x4 fit your space?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Measure the hole in your wall, ceiling, or floor — do not measure your old vent cover.\u003c\/p\u003e\n\u003cp\u003eThis 12x4 aluminum vent cover is designed to fit a standard 12\" × 4\" duct opening (also listed as a 4x12 wall register or 4 x 12 vent cover).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct opening size:\u003c\/strong\u003e 12\" × 4\" (this is what you measure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck size:\u003c\/strong\u003e 11-3\/4\" × 3-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall face size:\u003c\/strong\u003e 13-3\/4\" × 5-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign note:\u003c\/strong\u003e Like all linear slot diffusers, this model has a narrower face panel than many traditional louvered grilles to achieve a cleaner, minimal aesthetic. It may not fully conceal the unpainted area left by an old AC vent cover — a light paint touch-up may be needed for a perfectly finished look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuick check:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove your existing vent cover.\u003c\/li\u003e\n\u003cli\u003eMeasure the \u003cem\u003eopening\u003c\/em\u003e in the wall, ceiling, or floor — not the old cover.\u003c\/li\u003e\n\u003cli\u003eIf the opening is approximately 12\" × 4\", this 12x4 linear slot diffuser fits.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eDesigned for modern homes\u003c\/h2\u003e\n\u003cp\u003eThe 12x4 size fits long narrow openings in hallways, bedrooms, living rooms, and ceiling runs where a standard grille can look too busy. The linear face turns that opening into a cleaner architectural detail while keeping the installation straightforward.\u003c\/p\u003e\n\u003ch3\u003eOn the wall\u003c\/h3\u003e\n\u003cp\u003eReplaces dated stamped-steel grilles in hallways, bedrooms, living rooms, and long ceiling or wall runs. The clean slot line helps the HVAC opening blend into the room instead of becoming a visual distraction.\u003c\/p\u003e\n\u003ch3\u003eOn the ceiling\u003c\/h3\u003e\n\u003cp\u003eCreates a low-profile look for finished ceilings, modern condos, kitchens, bathrooms, and basements. Use the included screws for a secure wall or ceiling installation.\u003c\/p\u003e\n\u003ch3\u003eOn the floor\u003c\/h3\u003e\n\u003cp\u003eWorks in low-traffic floor areas where a modern register-style look is preferred. For busy walkways or heavy foot traffic, choose a heavier-duty floor register.\u003c\/p\u003e\n\n\u003ch2\u003ePremium Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo-plastic construction:\u003c\/strong\u003e Aluminum construction gives the diffuser a more premium feel than plastic covers and helps prevent cracking or yellowing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern surface-mount design:\u003c\/strong\u003e The face sits cleanly over the duct opening, making it ideal for retrofit projects and design upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComfort-focused airflow:\u003c\/strong\u003e The adjustable blade system helps distribute conditioned air more evenly across the room.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable and removable:\u003c\/strong\u003e The unit can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for Everyday Residential Use:\u003c\/strong\u003e Designed and crafted in Vietnam with attention to finish quality, durability, and practical usability for U.S. homeowners and contractors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e5-Minute Retrofit Installation\u003c\/h2\u003e\n\u003cp\u003eDesigned as a direct replacement for standard 12\" × 4\" duct openings with no structural modification required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Walls \u0026amp; Ceilings:\u003c\/strong\u003e Mounts with the included screws through pre-drilled hidden side holes. Only a screwdriver and the included adjustment tool are needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Floors:\u003c\/strong\u003e Drop the cover into the existing opening in low-traffic areas. Optional screws may be used for extra hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Removable:\u003c\/strong\u003e The diffuser can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe loading=\"lazy\" title=\"Installation guide — Green Vent 12x4 aluminum linear slot diffuser\" src=\"https:\/\/www.youtube.com\/embed\/2NETJ1EgEis\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum Linear Slot Diffuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12\" × 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e11-3\/4\" × 3-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Face Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e13-3\/4\" × 5-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack \/ Powder-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlloy Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation \/ Mounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew-In for wall\/ceiling; drop-in for low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAirflow Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-directional adjustable: left \/ right \/ both \/ closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupply air, return air, low-traffic floor register use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Surfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall, ceiling, low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVietnam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. What size do I order — 12x4 or face size?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrder by duct opening size. 12x4 means a 12\" × 4\" duct opening—the hole in your wall, ceiling, or floor. The visible face size of this diffuser is 13-3\/4\" × 5-3\/4\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Is a linear slot diffuser better for modern interiors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor contemporary rooms, yes. The straight slot profile looks cleaner than stamped louvers and pairs well with minimalist walls, ceilings, hardwood floors, and modern trim details.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Can I install this 12x4 vent cover on a ceiling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This 12x4 linear slot diffuser can be installed on walls, ceilings, or low-traffic floors as long as the duct opening measures 12\" × 4\". Use the included screws for wall and ceiling installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Does it include an adjustable airflow damper?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The built-in adjustment bar lets you direct airflow left, right, evenly to both sides, or fully close the blades to reduce airflow into unused rooms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Can this diffuser be used for both supply and return air?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt can be used for supply air and many residential return openings. For high-volume returns or filtration needs, choose a dedicated Green Vent air return grille with pre-filter instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6. Can I use a filter with this linear slot diffuser?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Standard filters should not be placed behind individual vent covers because they can restrict airflow and strain the HVAC system. Use a return grille with a pre-filter if filtration at the vent is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. Is the finish paintable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The powder-coated finish is durable as shipped, but it can be lightly sanded, primed, and painted with standard spray paint for custom color matching.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8. Can this be installed outdoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, in sheltered locations such as covered patios, garages, and enclosed porches. It is not intended for direct rain exposure.\u003c\/p\u003e\n\n\u003ch2\u003eExplore related Green Vent products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/12x4-aluminum-linear-slot-diffuser\"\u003e12x4 white aluminum linear slot diffuser\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/12x4-vent-covers\"\u003e12x4 vent covers collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/black-linear-slot-diffusers\"\u003eblack linear slot diffusers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003elinear slot diffuser collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/air-vent-covers\"\u003emodern air vent covers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor multi-room projects, standardize by duct opening size and finish so the vents look consistent across the home.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"eager\" alt=\"Green Vent 10x6 aluminum linear slot diffuser in white powder-coated finish, front view\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Side angled view of 10x6 white linear slot diffuser showing extruded aluminum profile and slot depth\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_2.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 linear slot diffuser installed on white wall in modern living room\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_3.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 aluminum vent cover mounted on ceiling above contemporary kitchen island\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_4.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 white vent cover installed flush on hardwood floor near baseboard\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_5.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hand measuring 10 inch by 6 inch duct opening with tape measure for sizing reference\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_6.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Diagram showing duct opening 10 by 6 inches and overall face size 11.75 by 7.75 inches\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_7.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Step-by-step retrofit installation of 10x6 aluminum linear slot diffuser on drywall\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_8.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Close-up of multi-directional adjustable airflow blade on 10x6 linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_9.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hidden side-screw mounting detail on 10x6 white aluminum vent cover\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_10.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"What is in the box - 10x6 linear slot diffuser, mounting screws, and blade adjustment tool\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_11.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"TÜV Rheinland tested certification badge for Green Vent 10x6 aluminum linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_12.jpg?v=1778639719\"\u003e\u003c\/p\u003e","brand":"GREEN VENT","offers":[{"title":"Default Title","offer_id":52347869167988,"sku":"GV.DLS.124B","price":31.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/aluminum-matte-black-linear-slot-diffuser-12x4-modern-air-vent-cover.webp?v=1769703887"},{"product_id":"6x4-aluminum-linear-slot-diffuser","title":"6x4 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening)","description":"\u003cp\u003e⚠️ \u003cstrong\u003eCHECK SIZE BEFORE PURCHASE:\u003c\/strong\u003e This 6x4 linear slot diffuser fits a \u003cstrong\u003e6\" × 4\" duct opening\u003c\/strong\u003e (the hole in your wall, ceiling, or floor — not your old cover face). \u003ca href=\"#gv-sizing-guide\"\u003eSee the full 6x4 sizing guide →\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits a 6\" × 4\" duct opening\u003c\/strong\u003e — measure the hole, not your old cover face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-in surface-mount replacement\u003c\/strong\u003e — no drywall, flooring, or duct modification required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern minimalist slot design\u003c\/strong\u003e for contemporary interiors and cleaner visual lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-resistant, durable, and zero plastic parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall, ceiling, or low-traffic floor compatible\u003c\/strong\u003e — one diffuser, multiple install scenarios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional adjustable airflow\u003c\/strong\u003e — direct air left, right, both ways, or fully closed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTÜV Rheinland tested\u003c\/strong\u003e — lead-free coating, phthalate-free materials, Prop 65 compliant, and corrosion-resistant finish.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDesigned for modern interiors, engineered for comfort\u003c\/h2\u003e\n\u003cp\u003eGive your 6\" × 4\" vent opening a contemporary finish with a durable aluminum linear slot diffuser—no remodeling required. This white surface-mount diffuser installs on walls, ceilings, and low-traffic floors, giving existing duct openings a cleaner, more intentional finish. White finish pairs naturally with white trim, light ceilings, painted walls, Scandinavian interiors, and light wood floors.\u003c\/p\u003e\n\u003ch2\u003eDesigned to upgrade, not to remodel\u003c\/h2\u003e\n\u003cp\u003eThis is a replacement-first diffuser, not a construction-only vent. It is designed to sit over an existing opening and deliver a cleaner finish with less visual clutter than a traditional grille.\u003c\/p\u003e\n\u003cp\u003eInside: heavy-gauge aluminum, a multi-directional adjustable blade system, and a powder-coated finish made for everyday residential use. Outside: a clean slot profile that looks more refined than a bulky stamped grille.\u003c\/p\u003e\n\u003ch2 id=\"gv-sizing-guide\"\u003eSizing Guide — Will a 6x4 fit your space?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Measure the hole in your wall, ceiling, or floor — do not measure your old vent cover.\u003c\/p\u003e\n\u003cp\u003eThis 6x4 aluminum vent cover is designed to fit a standard 6\" × 4\" duct opening (also listed as a 4x6 wall register or 4 x 6 vent cover).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct opening size:\u003c\/strong\u003e 6\" × 4\" (this is what you measure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck size:\u003c\/strong\u003e 5-3\/4\" × 3-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall face size:\u003c\/strong\u003e 7-3\/4\" × 5-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign note:\u003c\/strong\u003e Like all linear slot diffusers, this model has a narrower face panel than many traditional louvered grilles to achieve a cleaner, minimal aesthetic. It may not fully conceal the unpainted area left by an old AC vent cover — a light paint touch-up may be needed for a perfectly finished look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuick check:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove your existing vent cover.\u003c\/li\u003e\n\u003cli\u003eMeasure the \u003cem\u003eopening\u003c\/em\u003e in the wall, ceiling, or floor — not the old cover.\u003c\/li\u003e\n\u003cli\u003eIf the opening is approximately 6\" × 4\", this 6x4 linear slot diffuser fits.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eDesigned for modern homes\u003c\/h2\u003e\n\u003cp\u003eThe 6x4 size is best for compact openings in half baths, laundry rooms, narrow hallways, built-in shelving zones, and small secondary rooms where a bulky grille can look oversized. Its smaller face keeps the vent visually quiet while still giving the room an upgraded aluminum finish.\u003c\/p\u003e\n\u003ch3\u003eOn the wall\u003c\/h3\u003e\n\u003cp\u003eReplaces dated stamped-steel grilles in half baths, laundry rooms, narrow hallways, closets, and small secondary spaces. The clean slot line helps the HVAC opening blend into the room instead of becoming a visual distraction.\u003c\/p\u003e\n\u003ch3\u003eOn the ceiling\u003c\/h3\u003e\n\u003cp\u003eCreates a low-profile look for finished ceilings, modern condos, kitchens, bathrooms, and basements. Use the included screws for a secure wall or ceiling installation.\u003c\/p\u003e\n\u003ch3\u003eOn the floor\u003c\/h3\u003e\n\u003cp\u003eWorks in low-traffic floor areas where a modern register-style look is preferred. For busy walkways or heavy foot traffic, choose a heavier-duty floor register.\u003c\/p\u003e\n\u003ch2\u003ePremium Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo-plastic construction:\u003c\/strong\u003e Aluminum construction gives the diffuser a more premium feel than plastic covers and helps prevent cracking or yellowing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern surface-mount design:\u003c\/strong\u003e The face sits cleanly over the duct opening, making it ideal for retrofit projects and design upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComfort-focused airflow:\u003c\/strong\u003e The adjustable blade system helps distribute conditioned air more evenly across the room.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable and removable:\u003c\/strong\u003e The unit can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested Safe for Your Home:\u003c\/strong\u003e Independently tested by TÜV Rheinland across 4 safety standards — lead-free surface coating, phthalate-free materials, free of PBT toxic chemicals, and corrosion-resistant finish per ASTM B117 salt spray standard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e5-Minute Retrofit Installation\u003c\/h2\u003e\n\u003cp\u003eDesigned as a direct replacement for standard 6\" × 4\" duct openings with no structural modification required.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Walls \u0026amp; Ceilings:\u003c\/strong\u003e Mounts with the included screws through pre-drilled hidden side holes. Only a screwdriver and the included adjustment tool are needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Floors:\u003c\/strong\u003e Drop the cover into the existing opening in low-traffic areas. Optional screws may be used for extra hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Removable:\u003c\/strong\u003e The diffuser can be removed for cleaning, painting, maintenance, or future room updates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe loading=\"lazy\" title=\"Installation guide — Green Vent 6x4 aluminum linear slot diffuser\" src=\"https:\/\/www.youtube.com\/embed\/2NETJ1EgEis\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum Linear Slot Diffuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6\" × 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5-3\/4\" × 3-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall Face Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7-3\/4\" × 5-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite \/ Powder-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlloy Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation \/ Mounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew-In for wall\/ceiling; drop-in for low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAirflow Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-directional adjustable: left \/ right \/ both \/ closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupply air, return air, low-traffic floor register use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Surfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall, ceiling, low-traffic floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVietnam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. What size do I order — 6x4 or face size?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrder by duct opening size. 6x4 means a 6\" × 4\" duct opening—the hole in your wall, ceiling, or floor. The visible face size of this diffuser is 7-3\/4\" × 5-3\/4\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. What is the difference between a linear slot diffuser and a regular vent cover?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA linear slot diffuser moves air through a clean continuous slot instead of a visible louvered face. The result is a more modern look and a smoother airflow pattern for residential supply or return openings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Can I install this 6x4 vent cover on a ceiling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This 6x4 linear slot diffuser can be installed on walls, ceilings, or low-traffic floors as long as the duct opening measures 6\" × 4\". Use the included screws for wall and ceiling installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Does it include an adjustable airflow damper?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The built-in adjustment bar lets you direct airflow left, right, evenly to both sides, or fully close the blades to reduce airflow into unused rooms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Can this diffuser be used for both supply and return air?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt can be used for supply air and many residential return openings. For high-volume returns or filtration needs, choose a dedicated \u003ca href=\"https:\/\/www.greenvent.us\/products\/6x4-air-return-grille-pre-filter\"\u003e6x4 air return grille with pre-filter\u003c\/a\u003e instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6. Can I use a filter with this linear slot diffuser?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Standard filters should not be placed behind individual vent covers because they can restrict airflow and strain the HVAC system. Use a return grille with a pre-filter if filtration at the vent is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. Is the finish paintable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The powder-coated finish is durable as shipped, but it can be lightly sanded, primed, and painted with standard spray paint for custom color matching.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8. Can this be installed outdoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, in sheltered locations such as covered patios, garages, and enclosed porches. It is not intended for direct rain exposure.\u003c\/p\u003e\n\u003ch2\u003eExplore related Green Vent products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/products\/6x4-air-return-grille-pre-filter\"\u003e6x4 air return grille with pre-filter\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/6x4-vent-covers\"\u003e6x4 vent covers collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/white-linear-slot-diffusers\"\u003ewhite linear slot diffusers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003elinear slot diffuser collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/air-vent-covers\"\u003emodern air vent covers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eA clean vent upgrade starts with the right size. Confirm the opening, review the face size, and contact support if anything looks unusual.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"eager\" alt=\"Green Vent 10x6 aluminum linear slot diffuser in white powder-coated finish, front view\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Side angled view of 10x6 white linear slot diffuser showing extruded aluminum profile and slot depth\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_2.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 linear slot diffuser installed on white wall in modern living room\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_3.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 aluminum vent cover mounted on ceiling above contemporary kitchen island\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_4.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"10x6 white vent cover installed flush on hardwood floor near baseboard\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_5.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hand measuring 10 inch by 6 inch duct opening with tape measure for sizing reference\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_6.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Diagram showing duct opening 10 by 6 inches and overall face size 11.75 by 7.75 inches\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_7.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Step-by-step retrofit installation of 10x6 aluminum linear slot diffuser on drywall\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_8.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Close-up of multi-directional adjustable airflow blade on 10x6 linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_9.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"Hidden side-screw mounting detail on 10x6 white aluminum vent cover\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_10.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"What is in the box - 10x6 linear slot diffuser, mounting screws, and blade adjustment tool\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_11.jpg?v=1778639719\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg loading=\"lazy\" alt=\"TÜV Rheinland tested certification badge for Green Vent 10x6 aluminum linear slot diffuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/modern-air-vent-cover-lineaer-slot-diffuser-green-vent_12.jpg?v=1778639719\"\u003e\u003c\/p\u003e","brand":"GREEN VENT","offers":[{"title":"Default Title","offer_id":52356111729012,"sku":"GV.LSD.064W","price":14.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/aluminum-white-linear-slot-diffuser-6x4-modern-air-vent-cover.webp?v=1769703537"},{"product_id":"4x10-air-vent-cover-duct-opening-white-aluminum-linear-slot-diffuser","title":"10x4 White Slim Design Aluminum Linear Slot Diffuser (Duct Opening)","description":"\u003cp\u003e⚠️ \u003cstrong\u003eCHECK SIZE BEFORE PURCHASE:\u003c\/strong\u003e This 10x4 slim linear slot diffuser fits a \u003cstrong\u003e10\" × 4\" duct opening\u003c\/strong\u003e (measure the hole in your wall, ceiling, or floor — not your old cover face). \u003ca href=\"#gv-sizing-guide\"\u003eSee the full 10x4 sizing guide →\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOnly 1-1\/4\" neck depth\u003c\/strong\u003e — fits shallow ducts where standard models won’t go.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-in replacement\u003c\/strong\u003e for any 10\" × 4\" duct opening — no remodeling required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern minimalist slot design\u003c\/strong\u003e that blends with contemporary interiors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-proof, dent-resistant, zero plastic parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall, ceiling, or floor compatible\u003c\/strong\u003e — one cover, three install scenarios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-directional adjustable damper\u003c\/strong\u003e — left, right, both sides, or fully closed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-minute DIY install\u003c\/strong\u003e — included screws and blade adjustment tool.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDesigned for modern interiors, engineered for shallow spaces\u003c\/h2\u003e\n\u003cp\u003eReplace your dated 10\" × 4\" louvered grille with a precision-built aluminum linear slot diffuser designed for modern American homes — including homes with shallow duct cavities. This flush-mount 10x4 linear slot diffuser surface-mounts on walls, ceilings, and low-traffic floors with a neck that extends only 1-1\/4\" into the duct opening. No drywall work, no flooring rework, no contractor required.\u003c\/p\u003e\n\u003cp\u003eClean parallel blades, hidden side screws, and a powder-coated white finish create a clean architectural look for narrow hallways, compact bedrooms, small home offices, and tight wall or ceiling openings. The finish can also be spray painted for a closer wall or ceiling color match.\u003c\/p\u003e\n\u003ch2\u003eBuilt to fit where standard diffusers won’t\u003c\/h2\u003e\n\u003cp\u003eStandard linear slot diffusers have a taller neck that requires more depth inside the duct cavity. If your duct opening is shallow — common in thin walls, low-depth ceilings, older homes, or short duct runs — a full-depth diffuser may not go in cleanly.\u003c\/p\u003e\n\u003cp\u003eThe Green Vent Slim Series solves that fitment problem. With a neck depth of only 1-1\/4\" from the face surface, this 10x4 slim linear slot diffuser installs cleanly into duct openings with limited cavity depth. It keeps the same clean architectural slot profile and multi-directional airflow control, while being especially helpful in narrow wall cavities and older homes where a standard diffuser neck can bottom out quickly.\u003c\/p\u003e\n\u003ch2 id=\"gv-sizing-guide\"\u003eSizing Guide — Will a 10x4 fit your space?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Measure the hole in your wall, ceiling, or floor — do not measure your old vent cover.\u003c\/p\u003e\n\u003cp\u003eThis 10x4 slim linear slot diffuser is designed to fit a standard 10\" × 4\" duct opening (also listed as a 4x10 vent cover or 4x10 wall register in some references).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct opening size:\u003c\/strong\u003e 10\" × 4\" (this is what you measure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck depth (Slim Series):\u003c\/strong\u003e 1-1\/4\" from face surface\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign note:\u003c\/strong\u003e The linear slot face panel is narrower than a traditional louvered grille. A light paint touch-up may be needed where your old vent cover left an unpainted border around the opening.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuick check:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove your existing vent cover.\u003c\/li\u003e\n\u003cli\u003eMeasure the \u003cem\u003eopening\u003c\/em\u003e in the wall, ceiling, or floor — not the old cover face.\u003c\/li\u003e\n\u003cli\u003eIf the opening is approximately 10\" × 4\", this 10x4 vent cover fits.\u003c\/li\u003e\n\u003cli\u003eCheck your duct cavity depth: if it is shallow, the Slim Series is built for that situation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eDesigned for modern homes\u003c\/h2\u003e\n\u003ch3\u003eOn the wall\u003c\/h3\u003e\n\u003cp\u003eReplaces dated stamped-steel grilles in narrow hallways, compact bedrooms, small home offices, and tight wall or ceiling openings. The flush profile and clean slot line keep the focus on your interior — not the HVAC. Works as both a decorative supply air register and a return air vent cover. The 1-1\/4\" neck depth makes it practical in thin partition walls where standard models may not have room to fit.\u003c\/p\u003e\n\u003ch3\u003eOn the ceiling\u003c\/h3\u003e\n\u003cp\u003eA low-profile look for finished basements, modern condos, kitchens, bathrooms, and low-depth ceiling builds. The slim neck depth is especially useful where full-depth diffusers simply cannot go. Works with both supply and return air openings.\u003c\/p\u003e\n\u003ch3\u003eOn the floor\u003c\/h3\u003e\n\u003cp\u003eThe slim, fully-aluminum profile is suitable for low-traffic floor areas such as bedrooms and home offices. For high-traffic walk paths, consider a heavier-gauge \u003ca href=\"https:\/\/www.greenvent.us\/collections\/floor-register\"\u003efloor register\u003c\/a\u003e instead.\u003c\/p\u003e\n\u003ch2\u003ePremium Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlim 1-1\/4\" Neck Depth:\u003c\/strong\u003e Engineered specifically for shallow duct cavities — only 1-1\/4\" of neck extends from the face surface into the duct. Installs where many full-depth linear slot diffusers cannot, with no ductwork modification or remodeling required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlloy Aluminum Construction:\u003c\/strong\u003e Heavy-gauge alloy aluminum frame with precision-spaced blades and zero plastic parts. Rust-proof, warp-resistant, and won’t yellow or crack like plastic alternatives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArchitectural White Finish:\u003c\/strong\u003e Premium powder-coated surface wipes clean with a damp cloth and accepts standard spray paint for a custom color match. Hidden side screws create a clean, flush look with no visible fasteners on the faceplate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Directional Adjustable Airflow:\u003c\/strong\u003e A precision adjustment bar directs airflow left, right, evenly to both sides, or fully closed to block unused rooms. Wider slot openings help air pass at controlled velocity with less turbulence, supporting quieter everyday operation in bedrooms, nurseries, and home offices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrafted in Vietnam:\u003c\/strong\u003e Designed and manufactured in Vietnam from alloy aluminum — no plastic parts — to meet the expectations of U.S. homeowners and contractors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e5-Minute Retrofit Installation\u003c\/h2\u003e\n\u003cp\u003eDesigned as a direct drop-in replacement for standard 10\" × 4\" duct openings with no modification required — even in shallow duct cavities.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Walls \u0026amp; Ceilings:\u003c\/strong\u003e Mounts with the included screws through pre-drilled hidden side holes. Only a screwdriver and the included blade adjustment tool are needed. No drywall edge damage, no visible fasteners on the face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn Floors:\u003c\/strong\u003e Simply drop the cover into the existing opening in low-traffic areas. Optional screws may be added for extra hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Removable:\u003c\/strong\u003e The unit removes and reinstalls cleanly. If you are unsure about sizing, contact \u003ca href=\"mailto:support@greenvent.us\"\u003esupport@greenvent.us\u003c\/a\u003e before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart \/ Model Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGV.LSD.S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\" × 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Depth (Slim Series)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1-1\/4\" from face surface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 x 6 x 2 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eItem Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14.9 ounces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite \/ Powder-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum (zero plastic)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSlim Design (shallow duct cavity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation \/ Mounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew-In (wall\/ceiling); Drop-In (floor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAirflow Direction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-directional adjustable (left \/ right \/ both \/ closed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupply Air, Return Air, Floor Register\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Surfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall, Ceiling, Low-traffic Floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVietnam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecial Features\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSlim 1-1\/4\" neck, Removable, Paintable, Hidden Side-screw Mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScrew, Adjustable airflow blade bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. What size do I order — 10x4 or face size?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrder by duct opening size. \"10x4\" means a 10\" × 4\" duct opening — the hole in your wall, ceiling, or floor. Do not order by the face size of your old cover.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. What makes the Slim Design different from a standard 10x4 linear slot diffuser?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Slim Series has a neck depth of only 1-1\/4\" from the face surface. Standard linear slot diffusers usually need more depth inside the duct cavity. If your wall, ceiling, or floor has a shallow duct cavity, the Slim Series is built for that fitment issue while keeping a modern slot profile and adjustable airflow.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. My duct cavity is very shallow. Will this actually fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, that is the main purpose of the Slim Series. As long as your duct opening is approximately 10\" × 4\" and you have at least 1-1\/4\" of clearance behind the surface, this slim diffuser is designed to fit where many standard models cannot.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Can I install this on a ceiling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. This 10x4 vent cover mounts on walls, ceilings, and low-traffic floors. The slim neck is especially useful for shallow ceiling cavities where full-depth diffusers have limited room.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Does it come with an airflow damper?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. A multi-directional adjustable blade system is built in, allowing you to direct airflow left, right, evenly to both sides, or close it for an unused room. An adjustment tool is included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6. Will it work with both supply and return openings?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes for supply air. It can also be used on return openings, but the slot face is narrower than a typical louvered return grille. For high-return-volume applications, consider the \u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-air-return-grille-pre-filter\"\u003e10x4 air return grille with pre-filter\u003c\/a\u003e instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. Can I use a filter with this vent cover?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Filters belong at the air handler or furnace, not at individual vent covers. A filter placed at the vent can restrict airflow and strain the HVAC system. If you need filtration at the vent opening, use an air return grille with pre-filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8. Can this be installed outdoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, but only in sheltered locations such as covered patios, garages, and enclosed porches. It is not rated for direct rain exposure.\u003c\/p\u003e\n\u003ch2\u003eExplore related Green Vent products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNeed return air filtration at the vent? Browse the \u003ca href=\"https:\/\/www.greenvent.us\/products\/10x4-air-return-grille-pre-filter\"\u003e10x4 air return grille with pre-filter\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eShop all sizes in the \u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003elinear slot diffuser collection\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eBrowse all 10x4 styles in the \u003ca href=\"https:\/\/www.greenvent.us\/collections\/10x4-vent-covers\"\u003e10x4 vent covers collection\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eSee all \u003ca href=\"https:\/\/www.greenvent.us\/collections\/white-linear-slot-diffuser\"\u003ewhite linear slot diffusers\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Gallery\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-1.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser replacing old rusty vent covers in a modern wood wall interior\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-2.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser decorative air vent cover for modern living room floor installation\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-3.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser benefits for better airflow control and modern home comfort\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-4.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser kitchen and living room ceiling airflow with modern interior design\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-5.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser bedroom wall installation for quiet adjustable airflow and modern decor\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-6.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser apartment bedroom wall vent with slim modern aluminum design\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-7.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser rust resistant bathroom floor vent cover for humid spaces\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-8.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser ceiling vent cover for entertainment room airflow and modern comfort\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-9.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser available in multiple sizes for wall ceiling and floor HVAC openings\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-10.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser sleek modern wall installation under staircase interior\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-11.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser quiet bedroom airflow and soundless air movement at night\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/slim-design-aluminum-linear-slot-diffuser-green-vent-12.jpg?v=1779412950\" alt=\"Green Vent 10x4 Slim Design Aluminum Linear Slot Diffuser adjustable airflow control for modern wall and ceiling HVAC installation\"\u003e\u003c\/p\u003e","brand":"GREEN VENT","offers":[{"title":"Default Title","offer_id":53916792488308,"sku":"GV.LSD.S104W","price":15.89,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/4.jpg?v=1770944630"}],"url":"https:\/\/www.greenvent.us\/collections\/2-slot-linear-diffuser.oembed","provider":"Green Vent","version":"1.0","type":"link"}