30" x 30" Cube Core Eggcrate Return Air Grille steel modern look and superior functionality

modern look and superior functionality

5" - SEE BELOW IN DESCRIPTION How To Measure A Grille

75"H – fits a 18" X 6" duct opening

actual front end outer dimensions are approximately 27 5/8" width X 24 5/8" height

75"H – fits a 16" X 16" duct opening

30" x 30" Cube Core Eggcrate Return Air Grille steel modern look and superior functionality+ Product Details Size 30" x 30" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 31. 75" X 31. 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 electric