16"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 29.75"h] w24h24 actual front end outer dimensions

actual front end outer dimensions are approximately 24 5/8" width X 18 5/8" height

+ Product Details Size - 20"w X 30"h is the size for the duct opening measurement only

+ Product Description Upgrade your HVAC system with our heavy-duty

reducing electric bills and extending HVAC machine lifespan

Actual Filter Size – 33 3/4"w x 35 3/4" x 1"

16"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 29.75"h] w24h24 actual front end outer dimensions+ Product Details Size 16"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 75" Width X 29. 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