14" x 36" or 36" x 14" Cube Core Eggcrate Return Air Grille w6h6 + Product Details Size -

+ Product Details Size - 28"w X 20"h is the size for the duct opening measurement only

Just run your finger along the edge of the top plate and you will find a smooth finished surface

actual front end outer dimensions are approximately 22 5/8" width X 52 5/8" height

The first number in a grille size

14" x 36" or 36" x 14" Cube Core Eggcrate Return Air Grille w6h6 + 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