26"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 19.75"h] 8" Diameter 3 * Insulation density is

3 * Insulation density is 30kgs/CBM = 0

Actual Filter Size – 17 3/4"w x 21 3/4" x 1"

This Will Create A Cycle Of In And Out Air FLow

offering maximum flexibility

+ Product Details Size - 24"w X 36"h is the size for the duct opening measurement only

26"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 19.75"h] 8" Diameter 3 * Insulation density is+ Product Details Size 26"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 27. 75" Width X 19. 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