20"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 17.75"h] w32h32 One model suits both T-Bar

One model suits both T-Bar and Drywall installations

This simple adjustment reduces HVAC strain

allowing you to choose the best option to suit your airflow needs

allowing you to update the aesthetic in your home without losing valuable seasonal control of your HVAC system

+ Product Details Size – 28"w X 26"h is the size for the duct opening measurement only

20"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 17.75"h] w32h32 One model suits both T-Bar+ Product Details Size 20"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 75" Width X 17. 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