28" x 32" or 32" x 28" Cube Core Eggcrate Return Air Grille 12in diameter actual front end outer dimensions

actual front end outer dimensions are approximately 30 5/8" width X 26 5/8" height

8" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover

5" width x 13

+ Product Details Size - 16"w X 32"h is the size for the duct opening measurement only

28" x 32" or 32" x 28" Cube Core Eggcrate Return Air Grille 12in diameter actual front end outer dimensions+ Product Details Size 28" x 32" or 32" x 28" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 75" X 33. 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