Description
listed size +1
+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 28" or 28" x 12" duct opening (measured at the opening)
Actual Filter Size – 35 3/4"w x 23 3/4" x 1"
The crank handle lever makes it easy to adjust to every weather situation
30"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 31.75"w x 21.75"h] Compatible With Duct 6in listed size +1 w6h6 actual front end outer MFFG410 1 listed size +1 + Product Details Perfect Fit & Easy Sizing Designed for a 12" x 28" or 28" x 12" duct opening (measured at the opening)