Turbine Vents

Technically, turbine vents aren't a fixed vent system because they use a moving part to help exhaust air from an attic. That moving part consists of a series of specially shaped vanes that turns wind force into a rotary motion. As the spinning vanes gain velocity, they create an area of negative air pressure. That negative pressure, in turn, pulls air from an attic. Although not as effective as ridge vents, turbine vents provide a low-cost alternative in areas where consistent wind speeds of at least 5 mph are typical. Without that minimal wind speed, turbine vents act essentially as roof vents. When the wind is blowing, however, turbine vents can be effective air movers. To provide maximum ventilation benefits, turbine vents, like roof vents, must be equally spaced along a roof. (See illustration.) Otherwise, ventilation will be focused in the area surrounding the turbine vent, allowing hot spots to develop in other areas of the attic. Source: Air Vent Inc. A Certainteed Company Reprinted with permission

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