32" x 36" or 36" x 32" Cube Core Eggcrate Return Air Grille Supply Grille + Product Details Size -

+ Product Details Size - 10"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 22 5/8" height

+ Product Details Size – 20" x 30" or 30" x 20" is the size for the duct opening measurement only

please note that the total outer dimensions of the grille measure 14" in diameter

32" x 36" or 36" x 32" Cube Core Eggcrate Return Air Grille Supply Grille + Product Details Size -+ 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