20x12 Return Air Grille (Duct Opening Size), Air Return Vent Cover, AC Vent Cover, Cold Air Return Vent Cover, Flat Return Air Grilles, Outer Dimensions:21.75"W x 13.75"H (20"W x 12"H, Duct Opening) — Open-Box, 17% Off

1. Get the Perfect Fit: Always measure the actual duct opening in your wall or ceiling—not the old grille! This return air grille is designed to fit a 20"W x 12"H duct opening. The overall size is 21.75"W x 13.75"H, providing a generous overlap for clean coverage and a flush finish. Order the size that matches your measured duct opening for a seamless install. 2. Heavy-Duty Steel Construction: Built from high-quality stamped steel, this air return vent cover offers exceptional sturdiness and a scratch-resistant powder-coated finish. Result: zero rust, no yellowing, and no warping through thousands of heat-cool cycles, whether it’s mounted above a steamy shower or in a restaurant kitchen. All edges are rolled and smoothed for safety, any residential or commercial space. 3. High-Efficiency Airflow & Quiet & Energy Efficient: The fixed 40-degree angled maximizes airflow while reducing noise—helping your HVAC system run smoother and quieter. The AC return vent cover designed for return air applications, improves air circulation and set-point faster, eases fan load, and can actually lower utility bills. 4. Easy Installation: Install quickly and securely using the included screws and pre-drilled countersunk holes. Cold air return vent cover mounts flush to walls or ceilings for a clean, professional appearance. Wall vent cover ideal for use in homes, offices, schools, stores—wherever efficient, unattended ventilation is needed. A great solution for DIYers and pros alike. 5. Quality Assured: We carefully package each return air grill in reinforced cardboard and shrink wrap to prevent shipping damage. Every unit is hand-inspected before it leaves our warehouse—if you have any questions, our support team is here to help. We are committed to ensuring you have a positive experience from purchase to installation. Vent Cover 20 x 12 Wall (Duct Opening Size), Outer Dimensions: 21.75"W x 13.75"H, Air Return Vent Cover, Flat Return Air Vent Cover, AC Return Vent Cover, Cold Air Return Vent Cover, Wall Vent Cover, Return Vent Covers for Home Wall
Features:
① This is a flat stamped steel return air grille. Please order by the duct opening measurement. (ONLY MEASURE THE DUCT OPENING, DO NOT MEASURE YOUR OLD GRILLE! )
How to Measure for Your Return Air Grille:
Measure the Duct Opening (the hole on the wall/ceiling) by measuring the WIDTH first: 20", and then the HEIGHT: 12" (e.g. 20"W x 12"H), please order (20"W x 12"H, Duct Opening). This HVAC return air grille is the size you should order.
② Constructed from high-quality, solid stamped steel, this vent cover is built to endure. Scratch-resistant powder coat finish that withstands temperature fluctuations and daily use without warping, chipping, or fading.
③ Engineered with fixed, 40-degree angled fins and 1/2-inch spacing, this return air grille cover promotes maximum, unrestricted airflow while minimizing noise and vibration.
Specification:
- Design: Flat profile return air grille
- Material: Heavy duty solid steel, durable powder coated
- Duct Opening Size: 20"W x 12"H
- Overall Grille Dimensions: 21.75"W x 13.75"H
- Fin Design: 1/2" spaced fins set at a 40-degree angle
- Primary Use: Side Wall and Ceiling (Return, Supply Applications)
Package includes:
1 * 20x12 return air grille
1 * set of mounting screws
- Flush-mount Installation:
Step 1 - Remove your old grille. Remove the screws that secure the grille onto the wall/ceiling. If this is a ceiling application, prevent the grille from falling for your safety.
Step 2 - Counter-sunk screw holes and no sharp edges ensure safe and easy handling. With included screws and concealed mounting holes, installation on any sidewall or ceiling is simple.
Note:
1. Please allow a slight size variation of 0-0.4 inches due to manual measurement.
2. Due to lighting and monitor display differences, the actual product color may vary slightly from the images.