14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Grille with filter actual front end outer dimensions

actual front end outer dimensions are 13

+ Product Details Size – 36"w X 18"h is the size for the duct opening measurement only

+ Product Details Size – 12" x 36" or 36" x 12" is the size for the duct opening measurement only

Actual Filter Size – 21 3/4"w x 27 3/4" x 1"

+Product Details Size – 2"h x 12"w is the size for the duct opening measurement only

14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Grille with filter actual front end outer dimensions+ Product Details Size 14" x 26" or 26" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 75" X 27. 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