28"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 31.75"h] 6" Diameter + How To Measure A

+ How To Measure A Grille Overall Size:

+ Product Details Size - 18"w X 26"h X 2"d (for duct opening measurement only)

Width vs Height:

+ Product Details Size - 36"w X 20"h is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 12" Width X 4" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

28"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 31.75"h] 6" Diameter + How To Measure A+ Product Details Size 28"w X 30"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 31. 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