12"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 33.75"h] w8h8 actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 32 5/8" height -

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 36" or 36" x 12" duct opening (measured at the opening)

This versatile diffuser is available in 1-way

and sound level range of NC 25 to 35

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

12"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 33.75"h] w8h8 actual front end outer dimensions+ Product Details Size 12"w X 32"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 33. 75" Height Weather and Pest Proof These louvers are especially designed to prevent water from entering your home, and with a built in back 1 2" mesh they also protect you from annoying rodents like mice, rats, birds, and squirrels High Quality Aluminum The premium durable aluminum will never rust and it will never