12" x 28" or 28" x 12" Cube Core Eggcrate Return Air Grille 12in diameter angle the louvers up for

angle the louvers up for efficient cooling

+ Product Details Size - 32"w X 8"h is the size for the duct opening measurement only

Constructed from high-impact

Actual Filter Size – 29 3/4"w x 31 3/4" x 1"

12" x 28" or 28" x 12" Cube Core Eggcrate Return Air Grille 12in diameter angle the louvers up for+ 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