6" x 10" or 10" x 6" Cube Core Eggcrate Return Air Grille w28h28 Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 25 3/4" x 1"

our Butterfly Damper simplifies the process of managing airflow

Installation is simple

actual front end outer dimensions are approximately 42 5/8" width X 12 5/8" height -

+ Product Details Size – 16" x 18" or 18" x 16" is the size for the duct opening measurement only

6" x 10" or 10" x 6" Cube Core Eggcrate Return Air Grille w28h28 Actual Filter Size – 23+ Product Details Size 6" x 10" or 10" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 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