18"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 15.75"h] 10in diameter actual front end outer dimensions

actual front end outer dimensions are approximately 26 5/8" width X 38 5/8" height

And One Towards The Bottom Of The Door

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 6" duct openings

+ Product Details Size – 24"w X 26"h is the size for the duct opening measurement only

much more than required 700 PSI for R410

18"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 15.75"h] 10in diameter actual front end outer dimensions+ Product Details Size 18"w X 14"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 75" Width X 15. 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