Air Vent 20.2 in. H X 12 in. L X 12 in. D Mill Aluminum Brace Turbine TRIPLE WALL PIPE & ACCESS Get the most out of

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Air Vent 20.2 in. H X 12 in. L X 12 in. D Mill Aluminum Brace Turbine TRIPLE WALL PIPE & ACCESS Get the most out ofA 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. Air Vent's wind turbines are externally braced styles