{"product_id":"4x12-black-aluminum-linear-slot-diffuser","title":"4x12 Black Premium Aluminum Linear Slot Diffuser – Modern Design","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-slot design\u003c\/strong\u003e — a narrow, elongated size for hallways and long runs\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 4x12 linear slot diffuser for supply air in matte black — a narrow, elongated size for hallways, built to blend into dark trim.\u003c\/p\u003e\n\n\u003ch2 id=\"gv-sizing-guide\"\u003eWill a 4x12 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\" × 12\"\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\" × 11-3\/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\" × 13-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.43 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\" × 12\".\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 — 4x12 or face size?\u003c\/strong\u003e\u003cbr\u003eOrder by duct opening size (4\" × 12\"). The face size (5-3\/4\" × 13-3\/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\/4x12-aluminum-linear-slot-diffuser\"\u003e4x12 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\/4x12-aluminum-linear-slot-diffuser\"\u003e4x12 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":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","url":"https:\/\/www.greenvent.us\/products\/4x12-black-aluminum-linear-slot-diffuser","provider":"Green Vent","version":"1.0","type":"link"}