22" x 36" or 36" x 22" Cube Core Eggcrate Return Air Grille w6h6 + Product Details Size -

+ Product Details Size - 10"w X 12"h is the size for the duct opening measurement only

+ Product Details Size – 16"w X 20"h is the size for the duct opening measurement only

making it perfect for both residential and commercial installations

and 4-way configurations

75"H – fits a 12" X 6" duct opening

22" x 36" or 36" x 22" Cube Core Eggcrate Return Air Grille w6h6 + Product Details Size -+ Product Details Size 22" x 36" or 36" x 22" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 23. 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