Air Vent 20.2 in. H X 12 in. L X 12 in. D Mill Aluminum Brace Turbine

A non-electric alternative to ventilation, these vents use the natural force of wind and air pressure to spin and vent out stale attic air. They do it with a series of specially shaped vanes that catch the wind and provide rotary motion. This pulls hot, humid air from the attic. Turbine vents provide a low-cost ventilation alternative in areas where wind speeds of at least 5 mph are typical. Brand Name: Air Vent Height: 20.2 in. Length: 12 in. Diameter: 12 in. Color: Mill Material: Aluminum Product Type: Brace Turbine Shape: Circle Screen Included: No Wildlife Guard: No CFM: 345 CFM Airflow: 110 CFM Vent Type: Wind Turbines Pitch: 3/12 - 12/12