20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille Filter Grille + Product Details Size –

+ Product Details Size – 32"w X 34"h is the size for the duct opening measurement only

+ Product Details Size – 10"w X 20"h is the size for the duct opening measurement only

ensuring it arrives in perfect condition

+ Product Details Size - 10"w X 10"h X 2"d (for duct opening measurement only)

+ Product Details Size - The listed 12" diameter refers specifically to the size of the duct opening

20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille Filter Grille + Product Details Size –+ Product Details Size 20" x 34" or 34" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 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