36" x 36" Cube Core Eggcrate Return Air Grille 8" Diameter R value rating of insulation

R value rating of insulation - r3

+ Product Details Size - 10"w X 6"h is the size for the duct opening measurement only

+ Product Details Size - 8"w X 28"h is the size for the duct opening measurement only

+ Product Description Enhance your HVAC system with our Aluminum Return Filter Linear Bar Grille

actual front end outer dimensions are approximately 16 5/8" width X 12 5/8" height

36" x 36" Cube Core Eggcrate Return Air Grille 8" Diameter R value rating of insulation+ Product Details Size 36" x 36" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 37. 75" X 37. 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