22" x 36" or 36" x 22" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in + Product Details Size -

+ Product Details Size - 16"w X 28"h is the size for the duct opening measurement only

75"H – fits a 10" X 4" duct opening

actual front end outer dimensions are 37

Every grille has a front end frame

our Round Air Vent Supply Grille is the perfect addition

22" x 36" or 36" x 22" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in + 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