8" x 22" or 22" x 8" Cube Core Eggcrate Return Air Grille Compatible with Duct 8" Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 24 3/4" x 1"

+ How To Measure A Round Vent Overall Size:

+ Product Details Size - The listed 8" diameter refers specifically to the size of the duct opening

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 6" duct openings

Adjustable airflow control - by rotating the middle disk

8" x 22" or 22" x 8" Cube Core Eggcrate Return Air Grille Compatible with Duct 8" Actual Filter Size – 13+ Product Details Size 8" x 22" or 22" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 23. 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