32"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 23.75"h] Compatible with Duct 10" 75"H – fits a 20"

75"H – fits a 20" X 18" duct opening

3 * Insulation density is 30kgs/CBM = 0

diagonally feed it through the square hole

See our separate listing for T-Bar supply grille

32"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 23.75"h] Compatible with Duct 10" 75"H – fits a 20"+ Product Details Size 32"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 33. 75" Width X 23. 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