24 x 24-inch White Steel T-bar plaque diffuser, angled view

24 x 24-inch White Steel T-bar plaque diffuser, dimensions

24 x 24-inch White Steel T-bar plaque diffuser, packaging

24 x 24-inch White Steel T-bar plaque diffuser, front view

24 x 24-inch White Steel T-bar plaque diffuser, rear view

White Steel T-bar plaque diffuser, rear view 2

24 x 24-inch White Steel T-bar plaque diffuser, angled view 2

White Steel T-bar plaque diffuser, duct collar detail

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, 8" Round Neck

Item # 910101-2

Regular price: $58.29
Regular price: ~~$112.53~~
Sale price: $58.29
Unit price: per

Order By Neck Size8" 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.

13 in stock - ready to ship

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

Fits 24"x24" White Steel T-Bar Drop Ceiling Diffuser, 2x2 Lay-In Flat Plate Plaque, 8" Round Neck

$58.29

Quantity:

Fits 24"x24" White Steel T-Bar Drop Ceiling Diffuser, 2x2 Lay-In Flat Plate Plaque, 8" Round Neck

$58.29

Description
Shipping & Return
Submittal Drawing
Performance Data

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	910101-2
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

Airflow Performance Data

Only the sizes offered for this model are listed. Values are given across face velocities (FPM). A_k = effective area, A_n = 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.
Duct Size (in)	A_n (sq ft)	A_k (sq ft)	Metric	Face Velocity (FPM)
Duct Size (in)	A_n (sq ft)	A_k (sq ft)	Metric	400.0	500.0	600.0	700.0	800.0	900.0	1000.0	1200.0	1400.0
6"	0.20	0.275	Air Volume (CFM)	80	100	120	140	160	180	200	240	280
			Static Pressure (in. w.g.)	0.006	0.01	0.014	0.018	0.024	0.03	0.037	0.054	0.072
			Throw (ft)	1	2	2	2.5	3	3.5	4	4.5	5.5
8"This model	0.35	0.355	Air Volume (CFM)	140	175	210	245	280	315	350	420	490
			Static Pressure (in. w.g.)	0.01	0.015	0.022	0.029	0.038	0.049	0.06	0.086	0.117
			Throw (ft)	2.5	3.5	4	4.5	5	5.5	6.5	7	8
10"	0.54	0.62	Air Volume (CFM)	216	270	324	378	432	486	540	648	756
			Static Pressure (in. w.g.)	0.014	0.02	0.028	0.041	0.054	0.068	0.084	0.122	0.167
			Throw (ft)	4	5.5	6.5	8	9	10	11.5	14.5	17
12"	0.78	0.70	Air Volume (CFM)	312	390	468	546	624	702	780	936	1092
			Static Pressure (in. w.g.)	0.018	0.024	0.032	0.052	0.063	0.072	0.094	0.132	0.18
			Throw (ft)	5.5	7	8.5	10	11.5	13	14.5	17.5	20.5