26"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 23.75"h] sidewall + Product Details Size -

+ Product Details Size - 14"w X 12"h is the size for the duct opening measurement only

"Opposing" back blades

+ Product Details Size – 16"w X 8"h is the size for the duct opening measurement only

please note that the total outer dimensions of the grille measure 16" in diameter

The 1/2" white insulation

26"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 23.75"h] sidewall + Product Details Size -+ Product Details Size 26"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 27. 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