10 x 8-inch White Steel adjustable supply register, angled view
10 x 8-inch White Steel adjustable supply register, dimensions
10 x 8-inch White Steel adjustable supply register, packaging
10 x 8-inch White Steel adjustable supply register, front view
10 x 8-inch White Steel adjustable supply register, rear view
10 x 8-inch White Steel adjustable supply register, louvers open
10 x 8-inch White Steel adjustable supply register, damper lever detail
10 x 8-inch White Steel adjustable supply register, damper mechanism detail
10 x 8-inch White Steel adjustable supply register, damper adjustment in use
10 x 8-inch White Steel adjustable supply register, louvers set to spread pattern
10 x 8-inch White Steel adjustable supply register, angled side view
10 x 8-inch White Steel adjustable supply register, louvers set straight
10 x 8-inch White Steel adjustable supply register, angled view
10 x 8-inch White Steel adjustable supply register, dimensions
10 x 8-inch White Steel adjustable supply register, packaging
10 x 8-inch White Steel adjustable supply register, front view
10 x 8-inch White Steel adjustable supply register, rear view
10 x 8-inch White Steel adjustable supply register, louvers open
10 x 8-inch White Steel adjustable supply register, damper lever detail
10 x 8-inch White Steel adjustable supply register, damper mechanism detail
10 x 8-inch White Steel adjustable supply register, damper adjustment in use
10 x 8-inch White Steel adjustable supply register, louvers set to spread pattern
10 x 8-inch White Steel adjustable supply register, angled side view
10 x 8-inch White Steel adjustable supply register, louvers set straight

10x8 White Steel Adjustable Supply Register, Air Vent Cover with Damper for Sidewall Or Ceiling

Item # 210400-7
$23.69
$36.31
$23.69
Order By Duct Opening Measurements10"W x 8"H
Outer Dimensions 11-3/4"W X 9-3/4"H overall faceplate size
Bulk Pricing
2-1011-2021-4950+100+
$22.51$22.51$22.51$22.51
Subtotal:
140 in stock - ready to ship

Available Sizes & Options

See all Adjustable Steel Supply Registers →
Submittal Drawing AG-SD-0004 · REV 0 · 09/21/2026 · Letter PDF, covers every size of model 210400 Download PDF
10 x 8-inch White Steel adjustable supply register, angled view

10x8 White Steel Adjustable Supply Register, Air Vent Cover with Damper for Sidewall Or Ceiling

$23.69
10 x 8-inch White Steel adjustable supply register, angled view
10 x 8-inch White Steel adjustable supply register, dimensions
10 x 8-inch White Steel adjustable supply register, packaging
10 x 8-inch White Steel adjustable supply register, front view
10 x 8-inch White Steel adjustable supply register, rear view
10 x 8-inch White Steel adjustable supply register, louvers open
10 x 8-inch White Steel adjustable supply register, damper lever detail
10 x 8-inch White Steel adjustable supply register, damper mechanism detail
10 x 8-inch White Steel adjustable supply register, damper adjustment in use
10 x 8-inch White Steel adjustable supply register, louvers set to spread pattern
10 x 8-inch White Steel adjustable supply register, angled side view
10 x 8-inch White Steel adjustable supply register, louvers set straight

10x8 White Steel Adjustable Supply Register, Air Vent Cover with Damper for Sidewall Or Ceiling

$23.69
Description
Description
x

Product Overview

The 10"W x 8"H white steel supply register carries supply air into the room through a ceiling and sidewall opening. Powder-coated steel resists dents and rust for years of use, a stronger choice than lightweight plastic covers. A built-in damper adjusts or shuts the airflow, so comfort can be set room by room. Select this supply register by its duct opening size, not the overall face size, so it seats correctly on the first fit.

Key Features

  • Steel construction: Steel keeps the supply register rigid during installation and resists warping over time.
  • White finish: The white finish coordinates with common flooring, trim, and hardware.
  • Adjustable airflow: The built-in back damper controls the volume of air (from fully open to closed), so you can set airflow from a gentle breeze to a full flow. Where the register has adjustable blades, they deflect the throw left or right to aim the air.
  • Right-fit sizing: Ordered by duct opening size, this supply register matches standard duct dimensions and cuts wrong-size returns.

Dimensions and Specifications

Product type Supply Register
Airflow function Supply air
Nominal opening 10"W x 8"H
Overall face dimensions 11-3/4"W X 9-3/4"H
Material Steel
Finish White
Mounting location Ceiling and Sidewall
Airflow pattern Adjustable
Airflow control Adjustable damper
Order by Duct Opening
Pack quantity 1
MPN 210400-7
Brand AirGrilles.com

Is This the Right Vent for Your Opening?

Choose this supply register if you need an adjustable supply-air vent for a ceiling or sidewall opening. This supply register carries supply air and mounts on ceiling and sidewall surfaces. It is not designed for floor installation or foot traffic, 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 11-3/4"W X 9-3/4"H.

Installation

Position the supply register over the duct opening with the louvers 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 supply register
  • Mounting screws

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

Care and Maintenance

Clean the supply register 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 supply register matches your opening and airflow need.

Option Best for Material Installation
This supply register Wall or ceiling supply openings Steel Wall or ceiling
Return air grille Return-air openings Steel Wall or ceiling
Floor supply register Floor supply openings Steel Floor
Shipping & Return
Shipping & Return
x

Shipping

  • Free shipping on orders of $250 or more (contiguous US, T-Bar items excluded). Otherwise calculated at checkout.
  • Order by 11:00 AM ET on a business day and it ships the same day; otherwise it ships the next business day.
  • Delivery in approximately 2 to 5 business days after dispatch (FedEx, UPS, or USPS), with tracking emailed when your order ships.
  • Ships to all 50 states and D.C. Alaska and Hawaii ship at checkout rates (no free shipping; T-Bar items excluded). We cannot ship to U.S. territories, 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). On free-shipping orders, if your return leaves you with less than $250 in items (including a full return), original shipping is also deducted, up to the return shipping cost. 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.
Submittal Drawing
Submittal Drawing
x
Steel Adjustable Supply Register / With Damper, Sidewall & Ceiling AG-SD-0004 · REV 0 · 09/21/2026 · Model 210400, all sizes on one sheet
Download PDF
Submittal drawing AG-SD-0004: Steel Adjustable Supply Register / With Damper, Sidewall & Ceiling, dimensions for every size of model 210400

Vector PDF, Letter size, dimensions in inches. Select the drawing to open it full size.

Performance Data
Performance Data
x

Airflow Performance Data

Duct Size (in)Ak (sq ft)MetricFace Velocity (FPM)
400.0500.0600.0700.0800.0900.01000.01100.01200.01300.01400.01600.01800.02000.0
Pressure Loss (in. w.g.)all sizes0.0120.0160.0240.0320.040.0520.0640.0760.0920.1080.1240.1640.2040.252
6×60.183Air Volume (CFM)7392110128146165183201220238256293329366
Throw (ft)791011.515161720212325273135
10×40.203Air Volume (CFM)82102122143163184204224245265286326367408
Throw (ft)79111314171821222426303336
8×6 / 12×40.248Air Volume (CFM)99124149174198223248273298322347397446496
Throw (ft)811131416192023242729333741
10×60.315Air Volume (CFM)126158189221252284315347378410441504567630
Throw (ft)911141618222325283033364146
12×60.381Air Volume (CFM)152191229267305343381419457495533610686762
Throw (ft)1012151721222627303336414550
10×8This model0.421Air Volume (CFM)168211253295337379421463505547589674758842
Throw (ft)1113161821252629333437434753
14×60.448Air Volume (CFM)179224269314358403448493538582627717806896
Throw (ft)1114161923242730333539435054
12×8 / 16×60.512Air Volume (CFM)2052563073584104615125636146667178199221024
Throw (ft)1215172123263032353941475359
18×60.570Air Volume (CFM)22828534239945651357062768474179891210241140
Throw (ft)1215182224283033373943495561
14×80.591Air Volume (CFM)23629635541447353259165070976882794610641182
Throw (ft)1215192225283033374044505663
12×10 / 20×60.639Air Volume (CFM)256320383447511575639703767831895102211501278
Throw (ft)1316192325293236394245515865
16×80.684Air Volume (CFM)274342410479547616684752821889958109412311368
Throw (ft)1417202427303337414347535966
20×80.869Air Volume (CFM)348435521608695782869956104311301217139015641738
Throw (ft)1519242730353842455054616875
24×81.071Air Volume (CFM)42653263874585195810641170127713831490170219152128
Throw (ft)1721253033374246505459667583
18×181.72Air Volume (CFM)688860103212041376154817201892206422362408275230963440
Throw (ft)242832434855606571748190101112
Only the sizes offered for this model are listed. Values are given across face velocities (FPM). Ak = effective area, An = neck area. Static pressure in inches of water gauge (in. w.g.); throw in feet. The highlighted row is this product’s size. A dash (–) means the value is not published.
10x8 White Steel Adjustable Supply Register, Air Vent Cover with Damper for Sidewall Or Ceiling 10x8 White Steel Adjustable Supply Register, Air Vent Cover with Damper for Sidewall Or Ceiling 10x8 White Steel Adjustable Supply Register, Air Vent Cover with Damper for Sidewall Or Ceiling 10x8 White Steel Adjustable Supply Register, Air Vent Cover with Damper for Sidewall Or Ceiling

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