28" x 28" Cube Core Eggcrate Return Air Grille Compatible with Duct 10" this grill will provide the

this grill will provide the design aesthetic you're looking for

During summer

Actual Filter Size – 35 3/4"w x 21 3/4" x 1"

14"w X 4"h Is The Size For The Duct Opening Measurement Only

28" x 28" Cube Core Eggcrate Return Air Grille Compatible with Duct 10" this grill will provide the+ Product Details Size 28" x 28" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 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 electric