24" x 34" or 34" x 24" Cube Core Eggcrate Return Air Grille Copper Coil-Insulated Line Set our grill boasts an impressive

our grill boasts an impressive 96% airflow capacity

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

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

+ Product Details Size - 24"w X 24"h X 2"d (for duct opening measurement only)

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24" x 34" or 34" x 24" Cube Core Eggcrate Return Air Grille Copper Coil-Insulated Line Set our grill boasts an impressive+ 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