12" x 28" or 28" x 12" Cube Core Eggcrate Return Air Grille 12in diameter guaranteeing efficient ventilation throughout your

guaranteeing efficient ventilation throughout your space

By means of the smooth surface

angle the louvers up for efficient cooling

positioning supply and return grills accordingly

+ Product Details Size – 8"w X 30"h is the size for the duct opening measurement only

12" x 28" or 28" x 12" Cube Core Eggcrate Return Air Grille 12in diameter guaranteeing efficient ventilation throughout your+ Product Details Size 12" x 28" or 28" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 29. 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