10" x 22" or 22" x 10" Cube Core Eggcrate Return Air Grille w36h36 + Product Details Size -

+ Product Details Size - 28"w X 6"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 38 5/8" height -

Actual Filter Size – 11 3/4"w x 33 3/4" x 1"

+ Product Details Size – 10" x 32" or 32" x 10" is the size for the duct opening measurement only

+ Product Details Size - 8"w X 24"h is the size for the duct opening measurement only

10" x 22" or 22" x 10" Cube Core Eggcrate Return Air Grille w36h36 + Product Details Size -+ Product Details Size 10" x 22" or 22" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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