30" x 36" or 36" x 30" Cube Core Eggcrate Return Air Grille Compatible With Duct 6in reducing electric bills and extending

reducing electric bills and extending HVAC machine lifespan

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

Actual Filter Size – 15 3/4"w x 24 3/4" x 1"

Choose our premium HVAC grilles and registers for long-lasting durability

+ Product Details Size - 12"w X 10"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 6in reducing electric bills and extending+ 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