28"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 25.75"h] RG66 Black-HP + Product Details Size –

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

actual front end outer dimensions are approximately 22 5/8" width X 38 5/8" height -

+ Product Details Size – 8"w X 28"h is the size for the duct opening measurement only

Operating from -40°F to +248°F

28"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 25.75"h] RG66 Black-HP + Product Details Size –+ Product Details Size 28"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 25. 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