8"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 37.75"h] w14h14 so you are not left

so you are not left with much waste

+ Product Details Size – 22" x 36" or 36" x 22" is the size for the duct opening measurement only

85" width X 21

+ Product Details Size – 28" x 32" or 32" x 28" is the size for the duct opening measurement only

+ Product Details Size – 12"w X 18"h is the size for the duct opening measurement only

8"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 37.75"h] w14h14 so you are not left+ Product Details Size 8"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 75" Width X 37. 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 wear