24" x 34" or 34" x 24" Cube Core Eggcrate Return Air Grille Copper Coil-Insulated Line Set only measure the "hole" in

only measure the "hole" in the wall/duct

75" Width X 23

our grill boasts an impressive 96% airflow capacity

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

actual front end outer dimensions are approximately 27 5/8" width X 14 5/8" height

24" x 34" or 34" x 24" Cube Core Eggcrate Return Air Grille Copper Coil-Insulated Line Set only measure the "hole" in+ 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