36"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 7.75"h] Powder-Coated If your duct opening is

If your duct opening is 14 inches in diameter

you can attain the diameter of the vent

actual front end outer dimensions are approximately 27 5/8" width X 32 5/8" height

Design – Removable frame for easy filter change & cleaning - uses a 1" thick filter

36"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 7.75"h] Powder-Coated If your duct opening is+ Product Details Size 36"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 75" Width X 7. 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