18" x 20" or 20" x 18" Cube Core Eggcrate Return Air Grille w22h22 actual front end outer dimensions

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

Our innovative adjustable design changes the game

Actual Filter Size – 15 3/4"w x 17 3/4" x 1"

+ Product Details Size – 20"w X 34"h is the size for the duct opening measurement only

+ Product Details Size - 12"w X 8"h is the size for the duct opening measurement only

18" x 20" or 20" x 18" Cube Core Eggcrate Return Air Grille w22h22 actual front end outer dimensions+ Product Details Size 18" x 20" or 20" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" X 21. 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