6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Grille Compatible With Duct 6in This simple adjustment reduces HVAC

This simple adjustment reduces HVAC strain

The total outer size of this grille is the listed size plus plus 2 and 5/8"

actual front end outer dimensions are approximately 14 5/8" width X 22 5/8" height

customize cuts and flares as needed

6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Grille Compatible With Duct 6in This simple adjustment reduces HVAC+ Product Details Size 6" x 20" or 20" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 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