20" x 28" or 28" x 20" Cube Core Eggcrate Return Air Grille Return Grille line-height: 20px

line-height: 20px

This thoughtful design ensures optimal air circulation for your HVAC system

flex-shrink: 0

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 20" OR 20" X 14" duct opening (measured at the opening)

+ Product Details Size - 36"w X 6"h is the size for the duct opening measurement only

20" x 28" or 28" x 20" Cube Core Eggcrate Return Air Grille Return Grille line-height: 20px+ Product Details Size 20" x 28" or 28" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" X 29. 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