28" x 28" Cube Core Eggcrate Return Air Grille w32h32 + Product Details Size –

+ Product Details Size – 32"w X 22"h is the size for the duct opening measurement only

+ Product Details Size - 14"w X 22"h is the size for the duct opening measurement only

this air vent diffuser is built to last

With plain ends

Actual Filter Size – 31 3/4"w x 33 3/4" x 1"

28" x 28" Cube Core Eggcrate Return Air Grille w32h32 + 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