16" x 22" or 22" x 16" Cube Core Eggcrate Return Air Grille Powder-Coat Whether installed on a sidewall

Whether installed on a sidewall or ceiling

Actual Filter Size – 7 3/4"w x 23 3/4" x 1"

Operating temperature from -40°f to +248°f [-40°c to +120°c]

The premium durable material guarantees that they will never rust or wear through

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 4" duct openings

16" x 22" or 22" x 16" Cube Core Eggcrate Return Air Grille Powder-Coat Whether installed on a sidewall+ Product Details Size 16" x 22" or 22" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 23. 75". High Quality High quality, rust free aluminum construction with smooth finished edges and counter sunk screw holes (screws included); no sharp edges.. Installation Location sidewall and ceiling. Design Cubic core eggcrate design Offers highest airflow efficiency at almost 95%, reducing