28"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 37.75"h] 14" Diameter + Product Details Size –

+ Product Details Size – 16" x 20" or 20" x 16" is the size for the duct opening measurement only

Installation of the vents will eliminate the need to raise the door ensuring security and constant air flow and reduced heat transfer into attics and adjacent house walls

ensuring it arrives at your home in perfect condition

75"H – fits a 20" X 20" duct opening

28"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 37.75"h] 14" Diameter + Product Details Size –+ Product Details Size 28"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 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