20" x 20" Cube Core Eggcrate Return Air Grille w8h8 Its removable face allows hassle-free

Its removable face allows hassle-free cleaning

Scratch-Resistant

unrestricted airflow with a precise 50° angled design

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 8

20" x 20" Cube Core Eggcrate Return Air Grille w8h8 Its removable face allows hassle-free+ Product Details Size 20" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" X 21. 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 electric