20" x 28" or 28" x 20" Cube Core Eggcrate Return Air Grille Floor Grille actual front end outer dimensions

actual front end outer dimensions are approximately 38 5/8" width X 14 5/8" height -

actual front end outer dimensions are approximately 12 5/8" width X 22 5/8" height -

875" width X 12" height

875" height

20" x 28" or 28" x 20" Cube Core Eggcrate Return Air Grille Floor Grille actual front end outer dimensions+ 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