8"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 23.75"h] w30h30 the actual front end outer

the actual front end outer dimensions are 7" in diameter

with actual outer dimensions of 24

75"H – fits a 24" X 8" duct opening

actual front end outer dimensions are approximately 30 5/8" width X 28 5/8" height

Actual Filter Size – 31 3/4"w x 11 3/4" x 1"

8"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 23.75"h] w30h30 the actual front end outer+ Product Details Size 8"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 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 wear