32" x 32" Cube Core Eggcrate Return Air Grille Filter Grille + Product Details Size -

+ Product Details Size - 32"w X 32"h is the size for the duct opening measurement only

from 4" to 20"

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+ Product Details Size – 18"w X 10"h is the size for the duct opening measurement only

32" x 32" Cube Core Eggcrate Return Air Grille Filter Grille + Product Details Size -+ Product Details Size 32" x 32" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 33. 75" X 33. 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 electric