12 x 8-inch White Aluminum linear slot diffuser, front view
12 x 8-inch White Aluminum linear slot diffuser, dimensions
12 x 8-inch White Aluminum linear slot diffuser, packaging
12 x 8-inch White Aluminum linear slot diffuser, side view
12 x 8-inch White Aluminum linear slot diffuser, front view 2
8 x 8-inch White Aluminum linear slot diffuser, louver detail
8 x 8-inch White Aluminum linear slot diffuser, frame corner detail
8 x 8-inch White Aluminum linear slot diffuser, rear view
8 x 8-inch White Aluminum linear slot diffuser, angled view 2
8 x 8-inch White Aluminum linear slot diffuser, damper mechanism detail
8 x 8-inch White Aluminum linear slot diffuser, included hardware detail
8 x 8-inch White Aluminum linear slot diffuser, dimensions 2
12 x 8-inch White Aluminum linear slot diffuser, front view
12 x 8-inch White Aluminum linear slot diffuser, dimensions
12 x 8-inch White Aluminum linear slot diffuser, packaging
12 x 8-inch White Aluminum linear slot diffuser, side view
12 x 8-inch White Aluminum linear slot diffuser, front view 2
8 x 8-inch White Aluminum linear slot diffuser, louver detail
8 x 8-inch White Aluminum linear slot diffuser, frame corner detail
8 x 8-inch White Aluminum linear slot diffuser, rear view
8 x 8-inch White Aluminum linear slot diffuser, angled view 2
8 x 8-inch White Aluminum linear slot diffuser, damper mechanism detail
8 x 8-inch White Aluminum linear slot diffuser, included hardware detail
8 x 8-inch White Aluminum linear slot diffuser, dimensions 2

Item # 220101-21

12"x8" White Aluminum Linear 4-Slot Diffuser, Slim Modern AC Vent Cover for Wall, Ceiling & Floor

$45.59
$0.00
$45.59
Order By Duct Opening Measurements12"W x 8"H
Outer Dimensions 13-3/4"W X 9-13/16"H overall faceplate size
Bulk Pricing
2-1011-2021-4950+100+
$38.76$36.48$34.20$31.92
Subtotal:
140 in stock - ready to ship

Available Sizes & Options

See all Aluminum Linear Slot Diffusers →
12 x 8-inch White Aluminum linear slot diffuser, front view

12"x8" White Aluminum Linear 4-Slot Diffuser, Slim Modern AC Vent Cover for Wall, Ceiling & Floor

$45.59
12 x 8-inch White Aluminum linear slot diffuser, front view
12 x 8-inch White Aluminum linear slot diffuser, dimensions
12 x 8-inch White Aluminum linear slot diffuser, packaging
12 x 8-inch White Aluminum linear slot diffuser, side view
12 x 8-inch White Aluminum linear slot diffuser, front view 2
8 x 8-inch White Aluminum linear slot diffuser, louver detail
8 x 8-inch White Aluminum linear slot diffuser, frame corner detail
8 x 8-inch White Aluminum linear slot diffuser, rear view
8 x 8-inch White Aluminum linear slot diffuser, angled view 2
8 x 8-inch White Aluminum linear slot diffuser, damper mechanism detail
8 x 8-inch White Aluminum linear slot diffuser, included hardware detail
8 x 8-inch White Aluminum linear slot diffuser, dimensions 2

12"x8" White Aluminum Linear 4-Slot Diffuser, Slim Modern AC Vent Cover for Wall, Ceiling & Floor

$45.59
Description
Description
x

Product Overview

The 12"W x 8"H white aluminum linear slot diffuser carries supply air into the room through a ceiling, sidewall and floor opening. Extruded aluminum resists rust in humid rooms, a stronger choice than lightweight plastic covers. The 4-slot face spreads air in a clean, continuous line. Select this linear slot diffuser by its duct opening size, not the overall face size, so it seats correctly on the first fit.

Key Features

  • Aluminum construction: Aluminum keeps the linear slot diffuser rigid during installation and resists warping over time.
  • White finish: The white finish coordinates with common flooring, trim, and hardware.
  • 4-slot face: The 4-slot opening gives a slim architectural look while moving air evenly.
  • Right-fit sizing: Ordered by duct opening size, this linear slot diffuser matches standard duct dimensions and cuts wrong-size returns.

Dimensions and Specifications

Product type Linear Slot Diffuser
Airflow function Supply air
Nominal opening 12"W x 8"H
Overall face dimensions 13-3/4"W X 9-13/16"H
Material Aluminum
Finish White
Mounting location Ceiling, Sidewall and Floor
Slot type 4-slot
Airflow control Fixed
Order by Duct Opening
Pack quantity 1
MPN 220101-21
Brand AirGrilles.com

Is This the Right Vent for Your Opening?

Choose this linear slot diffuser if you need a supply-air vent for a ceiling opening. This linear slot diffuser carries supply air and mounts on ceiling, sidewall and floor surfaces. It is not designed for exterior or outdoor use, dryer exhaust venting or use as a filter-holding return grille. Confirm the airflow function against your HVAC layout before ordering.

How to Measure for This Vent

Remove the existing vent and measure the width and height of the duct opening, not the outer face of the old cover. Match those two numbers to the nominal size above. The overall face measures 13-3/4"W X 9-13/16"H.

Installation

Position the linear slot diffuser over the duct opening with the slotted face facing the room. Confirm the frame sits flush against the ceiling surface before marking the screw points. Secure it with the included screws without overtightening, since excess force can distort the frame.

What's Included

  • 1 x linear slot diffuser
  • Mounting screws

Ductwork, wall anchors, and installation tools are not included.

Care and Maintenance

Clean the linear slot diffuser with a soft, damp cloth and mild soap. Avoid abrasive chemicals that can damage the white finish. Dry the surface to keep moisture off the metal.

Compare Similar Options

Use this comparison to confirm the linear slot diffuser matches your opening and airflow need.

Option Best for Material Installation
This linear slot diffuser Wall or ceiling supply openings Aluminum Wall or ceiling
Return air grille Return-air openings Steel Wall or ceiling
Wall/ceiling supply register Wall or ceiling supply openings Steel Wall or ceiling
Shipping & Return
Shipping & Return
x

Shipping

  • Free shipping over $250 (contiguous US). Otherwise calculated at checkout.
  • Order by 11:00 AM ET on a business day and it ships the same day — otherwise the next business day.
  • Delivery in about 4–5 days after dispatch (FedEx / UPS), with tracking emailed when your order ships.
  • US only. We cannot ship to P.O. boxes or APO/FPO addresses.

Returns

  • 30-day returns. Item must be unused and in its original packaging; opened packages incur a 20% restocking fee.
  • Start a return from your account or at help@airgrilles.com (authorization required). We email a prepaid return label and deduct return shipping from your refund (free if the return is our error); refunds are issued within 5 business days of approval.
  • Damaged, defective, wrong, or lost item? Tell us within 7 days with photos and your order number.

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