28"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 27.75"h] Compatible with Duct 10" + Product Details Size –

+ Product Details Size – 16" x 32" or 32" x 16" is the size for the duct opening measurement only

Airflow – Easy unrestricted airflow for your HVAC system

Width vs Height:

Airflow – Improved airflow dynamics long neck bBody- reduced noise design - integrated spring fasteners

[Outer Dimensions: 22

28"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 27.75"h] Compatible with Duct 10" + Product Details Size –+ Product Details Size 28"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 27. 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