20" x 30" or 30" x 20" Cube Core Eggcrate Return Air Grille RV Mobile Home + Product Details Size –

+ Product Details Size – 16"w X 26"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 24 5/8" height

75" width X 26

Easy Installation: Comes with mounting screws for a secure fit in minutes

Actual Filter Size – 33 3/4"w x 11 3/4" x 1"

20" x 30" or 30" x 20" Cube Core Eggcrate Return Air Grille RV Mobile Home + Product Details Size –+ Product Details Size 20" x 30" or 30" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" X 31. 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