16"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 37.75"h] w20h20 + Product Details Size –

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

+ Product Details Size – 32"w X 28"h is the size for the duct opening measurement only

+ Product Details Size – 16" x 18" or 18" x 16" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 26 5/8" width X 18 5/8" height

or office environments

16"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 37.75"h] w20h20 + Product Details Size –+ Product Details Size 16"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 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