8" x 36" or 36" x 8" Cube Core Eggcrate Return Air Grille 18" Diameter + Product Details Size -

+ Product Details Size - 8"w X 26"h is the size for the duct opening measurement only

Optimized Comfort: By putting airflow control at your fingertips

875" width X 21

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

8" x 36" or 36" x 8" Cube Core Eggcrate Return Air Grille 18" Diameter + Product Details Size -+ Product Details Size 8" x 36" or 36" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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