10" x 28" or 28" x 10" Cube Core Eggcrate Return Air Grille w10h10 Actual Filter Size – 17

Actual Filter Size – 17 3/4"w x 7 3/4" x 1"

The integral multi-shutter damper with a convenient handle operator ensures that you can easily adjust the air volume

85" width X 21

Actual Front End Outer Dimensions Are 16" Diameter

+ Product Details Size – 22"w X 29"h is the size for the duct opening measurement only

10" x 28" or 28" x 10" Cube Core Eggcrate Return Air Grille w10h10 Actual Filter Size – 17+ Product Details Size 10" x 28" or 28" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" X 29. 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