28" x 28" Cube Core Eggcrate Return Air Grille Compatible with Duct 10" + Product Details Size -

+ Product Details Size - 36"w X 24"h is the size for the duct opening measurement only

+ Product Details Size – 24"w X 28"h is the size for the duct opening measurement only

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

Actual Filter Size – 23 3/4"w x 33 3/4" x 1"

28" x 28" Cube Core Eggcrate Return Air Grille Compatible with Duct 10" + Product Details Size -+ 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