8" x 22" or 22" x 8" Cube Core Eggcrate Return Air Grille w24h24 + Product Details Size -

+ Product Details Size - 36"w X 16"h is the size for the duct opening measurement only

75"H – fits a 14" X 12" duct opening

Actual Filter Size – 23 3/4"w x 19 3/4" x 1"

+ Product Details Size – 20"w X 40"h is the size for the duct opening measurement only

+ Product Details Size – 22"w X 22"h is the size for the duct opening measurement only

8" x 22" or 22" x 8" Cube Core Eggcrate Return Air Grille w24h24 + Product Details Size -+ Product Details Size 8" x 22" or 22" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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