24" x 34" or 34" x 24" Cube Core Eggcrate Return Air Grille Copper Coil-Insulated Line Set + Product Details Outer dimensions:

+ Product Details Outer dimensions: 19

+ Product Details Size – 14" x 30" or 30" x 14" is the size for the duct opening measurement only

+ Product Details Size – 20"w X 40"h is the size for the duct opening measurement only

our grill boasts an impressive 96% airflow capacity

Actual Filter Size – 33 3/4"w x 13 3/4" x 1"

24" x 34" or 34" x 24" Cube Core Eggcrate Return Air Grille Copper Coil-Insulated Line Set + Product Details Outer dimensions:+ Product Details Size 24" x 34" or 34" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 75" X 35. 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