8" x 36" or 36" x 8" Cube Core Eggcrate Return Air Grille Black Actual Filter Size – 25

Actual Filter Size – 25 3/4"w x 25 3/4" x 1"

actual front end outer dimensions are approximately 16 5/8" width X 30 5/8" height

actual front end outer dimensions are approximately 32 5/8" width X 22 5/8" height

actual front end outer dimensions are approximately 20 5/8" width X 20 5/8" height

8" x 36" or 36" x 8" Cube Core Eggcrate Return Air Grille Black Actual Filter Size – 25+ 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