18"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 33.75"h] w32h32 Actual Filter Size – 27

Actual Filter Size – 27 3/4"w x 19 3/4" x 1"

rated at R3

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 8" duct openings

+ Product Details Size - 8"w X 20"h is the size for the duct opening measurement only

The grille comes with all necessary screws for a secure fit

18"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 33.75"h] w32h32 Actual Filter Size – 27+ Product Details Size 18"w X 32"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 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