24"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 37.75"h] 6" Round Duct Pipe actual front end outer dimensions

actual front end outer dimensions are approximately 30 5/8" width X 10 5/8" height

+ Product Details Size – 20"w X 14"h is the size for the duct opening measurement only

Actual Filter Size – 31 3/4"w x 15 3/4" x 1"

And The Cooler Air From Outside WIll Flow In From The Bottom

+ Product Details Size - 14"w X 30"h is the size for the duct opening measurement only

24"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 37.75"h] 6" Round Duct Pipe actual front end outer dimensions+ Product Details Size 24"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 25. 75" Width X 37. 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