Wind Turbines, also referred to “Whirly Birds” in some parts of the country and a very common and low cost venting system you will find used in regions where winds are consistently 5mph or greater. 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.
Some of the features and benefits of wind turbines are: