24" x 30" or 30" x 24" Cube Core Eggcrate Return Air Grille Compatible with Duct 6" + Product Details Size -

+ Product Details Size - 12"w X 8"h is the size for the duct opening measurement only

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 4

this guard ensures long-lasting protection while offering a sleek

+ Product Details Size – 22"w X 34"h is the size for the duct opening measurement only

+ Product Details Size - 40"w X 6"h is the size for the duct opening measurement only

24" x 30" or 30" x 24" Cube Core Eggcrate Return Air Grille Compatible with Duct 6" + Product Details Size -+ Product Details Size 24" x 30" or 30" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 75" X 31. 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