10" x 10" Cube Core Eggcrate Return Air Grille Brown + Product Details Size -

+ Product Details Size - 20"w X 4"h is the size for the duct opening measurement only

75" width X 7

R value rating of insulation - r3

reducing electric bills and extending HVAC machine lifespan

10" x 10" Cube Core Eggcrate Return Air Grille Brown + Product Details Size -+ Product Details Size 10" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" X 11. 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