{"title":"4x8 Modern Vent Covers","description":"\u003ch2\u003e8x4 Vent Cover: Sizing Guide, Types \u0026amp; Expert Buying Advice\u003c\/h2\u003e\n\u003cp\u003eAn \u003ca href=\"https:\/\/www.greenvent.us\/collections\/8x4-vent-covers\/#\"\u003e8x4 vent cover\u003c\/a\u003e fits a duct opening that measures 8 inches long by 4 inches wide — and confirming that measurement before you order saves you from a frustrating return. This is one of the most common residential sizes, appearing on walls and ceilings in living rooms, hallways, and bedrooms. This guide covers everything you need: size verification, available types, buying criteria, and Green Vent's verified 8x4 options, so you can choose with confidence and move forward.\u003c\/p\u003e\n\u003cp\u003eBefore selecting a product type, confirm your duct opening measurement first — the section below walks you through it in three steps.\u003c\/p\u003e\n\u003ch2\u003eWhat Does \"8x4\" Mean? (And How to Confirm Your Measurement)\u003c\/h2\u003e\n\u003cp\u003e\"8x4\" always refers to the duct opening — the hole in the wall or ceiling — measured 8 inches in length by 4 inches in height, not the outer face of the cover already installed on top. The cover's flanged face overlaps the opening on all sides, so an 8x4 duct opening yields a cover outer face of approximately 9.75\" × 5.75\".\u003c\/p\u003e\n\u003cp\u003eFollow these three steps to confirm your size before ordering:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove the old cover by unscrewing it from the wall or ceiling surface.\u003c\/li\u003e\n\u003cli\u003eMeasure the duct opening — width and length at the inner wall edge, not the old cover's outer face.\u003c\/li\u003e\n\u003cli\u003eConfirm both dimensions match 8 inches × 4 inches before placing your order.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eNote that \"8x4\" and \"4x8\" describe the same duct opening. Manufacturers simply list length or width first depending on their labeling convention, but both terms refer to an identical duct.\u003c\/p\u003e\n\u003cp\u003eFor irregular or oversized openings, see our complete How to Measure Vent Covers\u003cem\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eTypes of 8x4 Vent Covers: What's Available\u003c\/h2\u003e\n\u003cp\u003eEight-by-four vent covers are available in four primary types — each designed for a different airflow function and placement — so the correct choice depends on whether the duct is supplying or returning air, and where it sits in your home.\u003c\/p\u003e\n\u003ctable style=\"width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 14.0794%;\"\u003eType\u003c\/th\u003e\n\u003cth style=\"width: 11.5523%;\"\u003eFunction\u003c\/th\u003e\n\u003cth style=\"width: 13.7184%;\"\u003ePlacement\u003c\/th\u003e\n\u003cth style=\"width: 20.0361%;\"\u003eKey Feature\u003c\/th\u003e\n\u003cth style=\"width: 39.1697%;\"\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 14.0794%;\"\u003e\u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003e\u003cstrong\u003eLinear Slot Diffuser\u003c\/strong\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 11.5523%;\"\u003eSupply air \/ Return\u003c\/td\u003e\n\u003ctd style=\"width: 13.7184%;\"\u003eWall \/ Ceiling\u003c\/td\u003e\n\u003ctd style=\"width: 20.0361%;\"\u003eAdjustable airflow controller, modern aesthetic\u003c\/td\u003e\n\u003ctd style=\"width: 39.1697%;\"\u003eModern homes upgrading from traditional louvered registers\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 src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/8x4-vent-cover-green-vent.jpg?v=1776957913\" alt=\"Modern residential interior showcasing a premium white aluminum wall vent cover, demonstrating the clean, flush aesthetic available for standard sizes like 8x4 - Green Vent\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003eWith the type identified, you now need clear decision criteria to finalize your selection.\u003c\/p\u003e\n\u003ch2\u003eHow to Choose the Right 8x4 Vent Cover for Your Home\u003c\/h2\u003e\n\u003cp\u003eChoosing the right 8x4 vent cover comes down to four variables: material, placement, airflow control, and finish.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum resists rust naturally, making it a strong choice for humid rooms such as bathrooms, kitchens, and laundry areas. Steel is heavier and can corrode over time without a protective coating — a meaningful difference in moisture-prone spaces. For a full material breakdown, see our Steel vs. \u003ca href=\"https:\/\/www.greenvent.us\/collections\/air-vent-covers\"\u003eAluminum Vent Covers\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlacement:\u003c\/strong\u003e Wall and ceiling applications benefit from a linear slot profile, which distributes conditioned air more evenly across a room. Match the cover type to the duct's supply or return function before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAirflow Control:\u003c\/strong\u003e \u003ca href=\"https:\/\/www.greenvent.us\/collections\/supply-air-vents\"\u003eSupply vents\u003c\/a\u003e should include an adjustable damper to control the airflow into a room and support room-by-room energy efficiency. \u003ca href=\"https:\/\/www.greenvent.us\/collections\/air-return-grille\"\u003eReturn vents\u003c\/a\u003e do not require a damper — a fixed grille is the appropriate choice there.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e White integrates cleanly into neutral interiors; black delivers architectural contrast and a statement look. Both finishes are available in Green Vent's aluminum slot diffuser lineup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eGreen Vent 8x4 Vent Covers: Aluminum Linear Slot Diffuser Collection\u003c\/h2\u003e\n\u003cp\u003eGreen Vent offers the 8x4 Aluminum Linear Slot Diffuser in two finish options — White and Black, designed for wall and ceiling supply air applications.\u003c\/p\u003e\n\u003cp\u003eBoth covers are rust-proof, lightweight, and designed for quieter HVAC operation. The minimalist profile integrates flush with modern interior walls and ceilings — no visual clutter, no exposed hardware on the face. The adjustable airflow controller lets you direct conditioned air precisely where it is needed, which can help improve room comfort and reduce energy waste. Installation requires only a standard screwdriver, making this a practical DIY upgrade for any modern home.\u003c\/p\u003e\n\u003cp\u003eBrowse Green Vent's full Linear Slot Diffuser collection to view complete specs, installation dimensions, and available pack options for your next 8x4 vent cover.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0916\/9138\/5204\/files\/8x4-vent-cover-green-vent-1.jpg?v=1776957926\" alt=\"Modern 8x4 metal wall vent covers featuring a sleek linear slot design, showcased in crisp white on a light wall and bold black on a dark wall - Green Vent\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003ch2\u003eInstalling Your 8x4 Vent Cover: What to Know\u003c\/h2\u003e\n\u003cp\u003eGreen Vent's 8x4 Aluminum Linear Slot Diffuser installs with a standard screwdriver in just a few minutes, using side-mount screws that keep the face free of visible hardware. Align the cover face over the duct opening, secure it with the included side screws, and adjust the airflow controller to your preferred direction. For a complete step-by-step walkthrough, see our Linear Slot Diffuser Installation Guide.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions About 8x4 Vent Covers\u003c\/h2\u003e\n\u003ch3\u003eIs an 8x4 vent cover the same as a 4x8 vent cover?\u003c\/h3\u003e\n\u003cp\u003eYes — an 8x4 and a 4x8 vent cover describe the same duct opening. Manufacturers list length or width first depending on their labeling convention, but both terms fit an identical duct.\u003c\/p\u003e\n\u003ch3\u003eWill an 8x4 cover fit a duct opening that measures 8.25\" × 4.1\"?\u003c\/h3\u003e\n\u003cp\u003eYes — standard 8x4 covers include a flanged overlap of approximately 0.75–1 inch per side, which accommodates minor duct sizing variations within normal tolerance. Measure the duct opening directly if you are unsure.\u003c\/p\u003e\n\u003ch3\u003eWhy choose aluminum over plastic for an 8x4 vent cover?\u003c\/h3\u003e\n\u003cp\u003eAluminum is rust-proof, longer-lasting, and maintains its finish in humid rooms where plastic can warp or discolor over time. See our full Steel vs. Aluminum comparison for more.\u003c\/p\u003e","products":[{"product_id":"4x8-aluminum-linear-slot-diffuser","title":"4x8 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening)","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-slot design\u003c\/strong\u003e — clean architectural look\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Deflector Bar\u003c\/strong\u003e — direct airflow left, right, both sides, or fully closed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-resistant, zero plastic parts\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWall, ceiling, or low-traffic floor compatible\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-minute drop-in install\u003c\/strong\u003e — no drywall or duct modification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA 4x8 linear slot diffuser for supply air — the modern alternative to a bulky louvered register.\u003c\/p\u003e\n\n\u003ch2 id=\"gv-sizing-guide\"\u003eWill a 4x8 Fit Your Space?\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4\" × 8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3-3\/4\" × 7-3\/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\u003e5-3\/4\" × 9-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.1 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlloy aluminum, white powder-coated (paintable)\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, wall\/ceiling\/floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDiffuser, Deflector Bar, screws, manual guide card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRemove your old cover and confirm the duct opening measures 4\" × 8\".\u003c\/li\u003e\n\u003cli\u003eMount with the included screws through the hidden side holes.\u003c\/li\u003e\n\u003cli\u003eUse the Deflector Bar to set airflow direction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size do I order — 4x8 or face size?\u003c\/strong\u003e\u003cbr\u003eOrder by duct opening size (4\" × 8\"). The face size (5-3\/4\" × 9-3\/4\") overlaps the opening.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this for supply air or return air?\u003c\/strong\u003e\u003cbr\u003eSupply air, with adjustable airflow. For return air in this size, see the \u003ca href=\"https:\/\/www.greenvent.us\/collections\/return-air-vents\"\u003eReturn Air Vents collection\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it come with an airflow control?\u003c\/strong\u003e\u003cbr\u003eYes — the Deflector Bar lets you direct air left, right, both ways, or fully closed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I install this on a ceiling?\u003c\/strong\u003e\u003cbr\u003eYes — the same diffuser mounts on walls, ceilings, or low-traffic floors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a black finish available?\u003c\/strong\u003e\u003cbr\u003eYes — see the \u003ca href=\"https:\/\/www.greenvent.us\/products\/4x8-black-aluminum-linear-slot-diffuser\"\u003e4x8 Black Linear Slot Diffuser\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eExplore Related Products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBlack finish: \u003ca href=\"https:\/\/www.greenvent.us\/products\/4x8-black-aluminum-linear-slot-diffuser\"\u003e4x8 Black Linear Slot Diffuser\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll sizes: \u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003eLinear Slot Diffuser collection\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\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":"4x8-black-aluminum-linear-slot-diffuser","title":"4x8 Black Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening)","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-slot design\u003c\/strong\u003e — compact size for closets, hallways, and small rooms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatte black finish\u003c\/strong\u003e — blends into dark floors, trim, and modern interiors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Deflector Bar\u003c\/strong\u003e — direct airflow left, right, both sides, or fully closed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid alloy aluminum\u003c\/strong\u003e — rust-resistant, zero plastic parts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-minute drop-in install\u003c\/strong\u003e — no drywall or duct modification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA 4x8 linear slot diffuser for supply air in matte black — a compact size that disappears into dark trim instead of standing out in white.\u003c\/p\u003e\n\n\u003ch2 id=\"gv-sizing-guide\"\u003eWill a 4x8 Fit Your Space?\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuct Opening Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4\" × 8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNeck Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3-3\/4\" × 7-3\/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\u003e5-3\/4\" × 9-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.09 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlloy aluminum, matte black powder-coated\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, wall\/ceiling\/floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDiffuser, Deflector Bar, screws, manual guide card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRemove your old cover and confirm the duct opening measures 4\" × 8\".\u003c\/li\u003e\n\u003cli\u003eMount with the included screws through the hidden side holes.\u003c\/li\u003e\n\u003cli\u003eUse the Deflector Bar to set airflow direction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size do I order — 4x8 or face size?\u003c\/strong\u003e\u003cbr\u003eOrder by duct opening size (4\" × 8\"). The face size (5-3\/4\" × 9-3\/4\") overlaps the opening.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this for supply air or return air?\u003c\/strong\u003e\u003cbr\u003eSupply air, with adjustable airflow. For return air, see the \u003ca href=\"https:\/\/www.greenvent.us\/collections\/return-air-vents\"\u003eReturn Air Vents collection\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the black finish fade or chip?\u003c\/strong\u003e\u003cbr\u003eNo — it's a matte black powder coat baked onto solid aluminum, not paint over plastic.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a white finish available?\u003c\/strong\u003e\u003cbr\u003eYes — see the \u003ca href=\"https:\/\/www.greenvent.us\/products\/4x8-aluminum-linear-slot-diffuser\"\u003e4x8 White Linear Slot Diffuser\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I install this on a floor?\u003c\/strong\u003e\u003cbr\u003eYes — mounts on walls, ceilings, or floors.\u003c\/p\u003e\n\n\u003ch2\u003eExplore Related Products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWhite finish: \u003ca href=\"https:\/\/www.greenvent.us\/products\/4x8-aluminum-linear-slot-diffuser\"\u003e4x8 White Linear Slot Diffuser\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll sizes: \u003ca href=\"https:\/\/www.greenvent.us\/collections\/linear-slot-diffuser\"\u003eLinear Slot Diffuser collection\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\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"}],"url":"https:\/\/www.greenvent.us\/collections\/4x8-vent-covers.oembed","provider":"Green Vent","version":"1.0","type":"link"}