14" x 36" or 36" x 14" Cube Core Eggcrate Return Air Grille Filter Grille + Product Details Size -

+ Product Details Size - 4"w X 28"h is the size for the duct opening measurement only

Heavy-gauge all-steel construction

The total outer size of this grille is the listed size

+ Product Spec Sheet

professional look

14" x 36" or 36" x 14" Cube Core Eggcrate Return Air Grille Filter Grille + Product Details Size -+ Product Details Size 14" x 36" or 36" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 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