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

+ Product Details Size – 16"w X 36"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 14 5/8" height -

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

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