20" x 28" or 28" x 20" Cube Core Eggcrate Return Air Grille w12h12 sans-serif

sans-serif

actual front end outer dimensions are 37

our grill boasts an impressive 96% airflow capacity

180 Degrees Double Direction Adjustable - Fins Are Manually Adjustable Individually for Optimal Air Distribution

20" x 28" or 28" x 20" Cube Core Eggcrate Return Air Grille w12h12 sans-serif+ Product Details Size 20" x 28" or 28" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 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