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: 17.8 in.
• Width: 20 in.
• Length: 20 in.
• Diameter: 12 in.
• Color: Mill
• Material: Aluminum
• Product Type: Brace Turbine
• Shape: Circle
• Screen Included: No
• Wildlife Guard: No
• Net Free Area: 95 sq in
• Vent Type: Wind Turbines
• Pitch: 3/12 - 12/12
• Interior Louver: Yes