32" x 36" or 36" x 32" Cube Core Eggcrate Return Air Grille steel Filter Size - 20

Filter Size - 20

Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 12" duct openings

Achieve superior control over your indoor airflow for a more comfortable space

actual front end outer dimensions are approximately 32 5/8" width X 8 5/8" height

actual front end outer dimensions are 8" diameter

32" x 36" or 36" x 32" Cube Core Eggcrate Return Air Grille steel Filter Size - 20+ Product Details Size 32" x 36" or 36" x 32" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 33. 75" X 37. 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