24 x 24-inch White Steel T-bar plaque diffuser, angled view
24 x 24-inch White Steel T-bar plaque diffuser, front view
24 x 24-inch White Steel T-bar plaque diffuser, rear view
24 x 24-inch White Steel T-bar plaque diffuser, angled view 2
24 x 24-inch White Steel T-bar plaque diffuser, rear view 2
24 x 24-inch White Steel T-bar plaque diffuser, mounting clip detail
24 x 24-inch White Steel T-bar plaque diffuser, frame corner detail
24 x 24-inch White Steel T-bar plaque diffuser, angled view
24 x 24-inch White Steel T-bar plaque diffuser, front view
24 x 24-inch White Steel T-bar plaque diffuser, rear view
24 x 24-inch White Steel T-bar plaque diffuser, angled view 2
24 x 24-inch White Steel T-bar plaque diffuser, rear view 2
24 x 24-inch White Steel T-bar plaque diffuser, mounting clip detail
24 x 24-inch White Steel T-bar plaque diffuser, frame corner detail

Item # 910101-1

Fits 24"x24" White Steel T-Bar Drop Ceiling Diffuser, 2x2 Lay-In Flat Plate Plaque, 6" Round Neck

$79.39
$79.39
Order By Neck Size6" Neck
Outer Dimensions 23-3/4"W x 23-3/4"H overall faceplate size
Special Price This item is already at our best price.
Subtotal:
Only 1 left in stock

Available Sizes & Options

See all Steel T-Bar Plaque Diffusers →
Submittal Drawing AG-SD-0040 · REV 0 · 09/21/2026 · Letter PDF, covers every size of model 910101 Download PDF
24 x 24-inch White Steel T-bar plaque diffuser, angled view

Fits 24"x24" White Steel T-Bar Drop Ceiling Diffuser, 2x2 Lay-In Flat Plate Plaque, 6" Round Neck

$79.39
24 x 24-inch White Steel T-bar plaque diffuser, angled view
24 x 24-inch White Steel T-bar plaque diffuser, front view
24 x 24-inch White Steel T-bar plaque diffuser, rear view
24 x 24-inch White Steel T-bar plaque diffuser, angled view 2
24 x 24-inch White Steel T-bar plaque diffuser, rear view 2
24 x 24-inch White Steel T-bar plaque diffuser, mounting clip detail
24 x 24-inch White Steel T-bar plaque diffuser, frame corner detail

Fits 24"x24" White Steel T-Bar Drop Ceiling Diffuser, 2x2 Lay-In Flat Plate Plaque, 6" Round Neck

$79.39
Description
Description
x

Product Overview

The 24"W x 24"H white steel T-bar plaque diffuser carries supply air into the room through a ceiling opening. Powder-coated steel resists dents and rust for years of use, a stronger choice than lightweight plastic covers. Select this T-bar plaque diffuser by its neck size size, not the overall face size, so it seats correctly on the first fit.

Key Features

  • Steel construction: Steel keeps the T-bar plaque diffuser rigid during installation and resists warping over time.
  • White finish: The white finish coordinates with common flooring, trim, and hardware.
  • Right-fit sizing: Ordered by neck size, this T-bar plaque diffuser matches standard duct dimensions and cuts wrong-size returns.

Dimensions and Specifications

Product type T-Bar Plaque Diffuser
Airflow function Supply air
Nominal opening 24"W x 24"H
Overall face dimensions 23-3/4"W x 23-3/4"H
Material Steel
Finish White
Mounting location Ceiling
Airflow control Fixed
Order by Neck Size
Pack quantity 1
MPN 910101-1
Brand AirGrilles.com

Is This the Right Vent for Your Opening?

Choose this T-bar plaque diffuser if you need a supply-air vent for a ceiling opening. This T-bar plaque diffuser carries supply air and mounts on ceiling 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. It drops into a standard 24x24 inch (2 feet by 2 feet) T-bar ceiling grid.

How to Measure for This Vent

This diffuser drops into a standard 24 x 24 inch T-bar ceiling grid. Confirm your grid openings are 2 by 2 feet, then match the 24"W x 24"H neck to your duct collar. The panel face measures 23-3/4"W x 23-3/4"H.

Installation

Position the T-bar plaque diffuser over the duct neck opening with the flat plate 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 T-bar plaque diffuser
  • Mounting screws

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

Care and Maintenance

Clean the T-bar plaque 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 t-bar plaque diffuser matches your opening and airflow need.

Option Best for Material Installation
This t-bar plaque diffuser Drop-ceiling supply (24x24 grid) Steel 24x24 T-bar grid
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.
Submittal Drawing
Submittal Drawing
x
Steel T-Bar Plaque Diffuser / 2x2 Lay-In, Round Neck AG-SD-0040 · REV 0 · 09/21/2026 · Model 910101, all sizes on one sheet
Download PDF
Submittal drawing AG-SD-0040: Steel T-Bar Plaque Diffuser / 2x2 Lay-In, Round Neck, dimensions for every size of model 910101

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)An (sq ft)Ak (sq ft)MetricFace Velocity (FPM)
400.0500.0600.0700.0800.0900.01000.01200.01400.0
6"This model0.200.275Air Volume (CFM)80100120140160180200240280
Static Pressure (in. w.g.)0.0060.010.0140.0180.0240.030.0370.0540.072
Throw (ft)1222.533.544.55.5
8"0.350.355Air Volume (CFM)140175210245280315350420490
Static Pressure (in. w.g.)0.010.0150.0220.0290.0380.0490.060.0860.117
Throw (ft)2.53.544.555.56.578
10"0.540.62Air Volume (CFM)216270324378432486540648756
Static Pressure (in. w.g.)0.0140.020.0280.0410.0540.0680.0840.1220.167
Throw (ft)45.56.5891011.514.517
12"0.780.70Air Volume (CFM)3123904685466247027809361092
Static Pressure (in. w.g.)0.0180.0240.0320.0520.0630.0720.0940.1320.18
Throw (ft)5.578.51011.51314.517.520.5
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.

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