28"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 7.75"h] fixed bar this grille offers a seamless AD-S-230-10x10 Actual Filter Size 25 Width_8in

this grille offers a seamless blend of functionality and aesthetics

actual front end outer dimensions are approximately 12 5/8" width X 16 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 26" OR 26" X 14" duct opening (measured at the opening)

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

+ Product Details Size - 22"w X 36"h is the size for the duct opening measurement only

28"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 29.75"w x 7.75"h] fixed bar this grille offers a seamless AD S 230 10x10 Actual Filter Size 25 Width_8in this grille offers a seamless blend of functionality and aesthetics actual front end outer dimensions are approximately 12 5 8" width X 16 5 8" height