30" x 36" or 36" x 30" Cube Core Eggcrate Return Air Grille Compatible with Duct 10" font-weight: 500

font-weight: 500

Actual Filter Size – 31 3/4"w x 31 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 26" duct opening (measured at the opening)

+ Product Details Size - 34"w X 28"h is the size for the duct opening measurement only

30" x 36" or 36" x 30" Cube Core Eggcrate Return Air Grille Compatible with Duct 10" font-weight: 500+ Product Details Size 30" x 36" or 36" x 30" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 32. 5" X 38. 5". 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