8 x 20-inch Brown Steel heavy duty return floor register, front view
8 x 20-inch Brown Steel heavy duty return floor register, dimensions
8 x 20-inch Brown Steel heavy duty return floor register, packaging
8 x 20-inch Brown Steel heavy duty return floor register, front view 2
8 x 20-inch Brown Steel heavy duty return floor register, angled view
8 x 20-inch Brown Steel heavy duty return floor register, frame corner detail
8 x 20-inch Brown Steel heavy duty return floor register, rivet detail
8 x 20-inch Brown Steel heavy duty return floor register, louver detail
8 x 20-inch Brown Steel heavy duty return floor register, louver detail 2
8 x 20-inch Brown Steel heavy duty return floor register, front view
8 x 20-inch Brown Steel heavy duty return floor register, dimensions
8 x 20-inch Brown Steel heavy duty return floor register, packaging
8 x 20-inch Brown Steel heavy duty return floor register, front view 2
8 x 20-inch Brown Steel heavy duty return floor register, angled view
8 x 20-inch Brown Steel heavy duty return floor register, frame corner detail
8 x 20-inch Brown Steel heavy duty return floor register, rivet detail
8 x 20-inch Brown Steel heavy duty return floor register, louver detail
8 x 20-inch Brown Steel heavy duty return floor register, louver detail 2

Item # 510102-20

8"x20" Brown Steel Return Air Floor Grille, Walkable Heavy-Duty Fixed-Blade Vent Cover

$33.99
$0.00
$33.99
Order By Duct Opening Measurements8"W x 20"H
Outer Dimensions 9-3/4"W X 21-3/4"H overall faceplate size
Bulk Pricing
2-1011-2021-4950+100+
$30.60$29.58$28.56$27.20
Subtotal:
Only 10 left in stock

Available Sizes & Options

See all Steel Heavy Duty Return Floor Grilles →
8 x 20-inch Brown Steel heavy duty return floor register, front view

8"x20" Brown Steel Return Air Floor Grille, Walkable Heavy-Duty Fixed-Blade Vent Cover

$33.99
8 x 20-inch Brown Steel heavy duty return floor register, front view
8 x 20-inch Brown Steel heavy duty return floor register, dimensions
8 x 20-inch Brown Steel heavy duty return floor register, packaging
8 x 20-inch Brown Steel heavy duty return floor register, front view 2
8 x 20-inch Brown Steel heavy duty return floor register, angled view
8 x 20-inch Brown Steel heavy duty return floor register, frame corner detail
8 x 20-inch Brown Steel heavy duty return floor register, rivet detail
8 x 20-inch Brown Steel heavy duty return floor register, louver detail
8 x 20-inch Brown Steel heavy duty return floor register, louver detail 2

8"x20" Brown Steel Return Air Floor Grille, Walkable Heavy-Duty Fixed-Blade Vent Cover

$33.99
Description
Description
x

Product Overview

The 8"W x 20"H brown steel return air floor grille carries return air back to the HVAC system through a floor opening. Powder-coated steel resists dents and rust for years of use, a stronger choice than lightweight plastic covers. Select this return air floor grille 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 return air floor grille rigid during installation and resists warping over time.
  • Brown finish: The brown finish coordinates with common flooring, trim, and hardware.
  • Walkable strength: The reinforced core supports foot traffic, which suits floor openings in busy rooms.
  • Right-fit sizing: Ordered by duct opening size, this return air floor grille matches standard duct dimensions and cuts wrong-size returns.

Dimensions and Specifications

Product type Return Air Floor Grille
Airflow function Return air
Nominal opening 8"W x 20"H
Overall face dimensions 9-3/4"W X 21-3/4"H
Material Steel
Finish Brown
Mounting location Floor
Airflow control Fixed
Order by Duct Opening
Pack quantity 1
MPN 510102-20
Brand AirGrilles.com

Is This the Right Vent for Your Opening?

Choose this return air floor grille if you need a return-air vent for a floor opening. This return air floor grille carries return air and mounts on floor surfaces. It is not designed for exterior or outdoor use or dryer exhaust venting. Confirm the airflow function against your HVAC layout before ordering. This heavy-duty return floor register holds up to foot traffic in busy rooms.

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 9-3/4"W X 21-3/4"H.

Installation

Set the floor register into the floor opening so the face rests level with the floor. No screws are required; the register drops in and its flange keeps it seated. Lift it out by the face for cleaning whenever needed.

What's Included

  • 1 x return air floor grille

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

Care and Maintenance

Clean the return air floor grille with a soft, damp cloth and mild soap. Avoid abrasive chemicals that can damage the brown finish. Dry the surface to keep moisture off the metal.

Compare Similar Options

Use this comparison to confirm the return air floor grille matches your opening and airflow need.

Option Best for Material Installation
This return air floor grille Floor return openings Steel Floor
Return air filter grille Returns that hold a 1-inch filter Steel Wall or ceiling
Eggcrate return grille High-airflow commercial returns Aluminum 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.
Technical Data
Technical Data
x

Airflow Performance Data

Duct Size (in)Ak (sq ft)MetricFace Velocity (FPM)
300.0400.0500.0600.0700.0800.0900.01000.0
Pressure Loss (in. w.g.)all sizes0.0080.0120.0160.020.0320.0440.0520.064
8×120.54Air Volume (CFM)162216270324378432486540
Throw (ft)1317212530353844
10×100.55Air Volume (CFM)165220275330385440495550
Throw (ft)1317212530353945
9×120.59Air Volume (CFM)177236295354413472531590
Throw (ft)1419242934394449
8×140.61Air Volume (CFM)183244305366427488549610
Throw (ft)1420243035404550
10×120.67Air Volume (CFM)201268335402469536603670
Throw (ft)––––––––
10×140.80Air Volume (CFM)240320400480560640720800
Throw (ft)1521283440455156
12×120.81Air Volume (CFM)243324405486567648729810
Throw (ft)1421283440465156
12×140.95Air Volume (CFM)285380475570665760855950
Throw (ft)1824303743505562
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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