24" x 32" or 32" x 24" Cube Core Eggcrate Return Air Grille Color_Red Oak Wood then you'll need a 14-inch

then you'll need a 14-inch round vent

actual front end outer dimensions are approximately 24 5/8" width X 31 5/8" height

+ Product Details Size - 12"w X 22"h is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 12" Width X 4" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

Actual Filter Size – 35 3/4"w x 25 3/4" x 1"

24" x 32" or 32" x 24" Cube Core Eggcrate Return Air Grille Color_Red Oak Wood then you'll need a 14-inch+ Product Details Size 24" x 32" or 32" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 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