14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Grille fixed bar + Product Details Size -

+ Product Details Size - 34"w X 28"h is the size for the duct opening measurement only

+ Product Details Size – 10" x 20" or 20" x 10" is the size for the duct opening measurement only

Actual Filter Size – 17 3/4"w x 27 3/4" x 1"

+ Product Details Size - 10"w X 22"h is the size for the duct opening measurement only

14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Grille fixed bar + Product Details Size -+ 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