12" x 30" or 30" x 12" Cube Core Eggcrate Return Air Grille Powder-Coated Efficient Airflow Design: The slots

Efficient Airflow Design: The slots are meticulously angled to diversify airflow in two directions

Whether you're restoring an old Victorian or craftsman style home

Crafted from high-quality red oak wood

R value rating of insulation - R3

ensuring a perfect fit

12" x 30" or 30" x 12" Cube Core Eggcrate Return Air Grille Powder-Coated Efficient Airflow Design: The slots+ Product Details Size 12" x 30" or 30" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 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