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] 2-Way Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 33 3/4" x 1"

Can be hooked up with our "Butterfly Dampers" for precise airflow control

+ Product Details Size - 8"w X 14"h is the size for the duct opening measurement only

+ Product Details Size – 22" x 24" or 24" x 22" is the size for the duct opening measurement only

Actual Filter Size – 25 3/4"w x 9 3/4" x 1"

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] 2-Way Actual Filter Size – 13+ 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