Fiercely competitive though the small-wind-generator market is, Southwest Windpower has become a world leader from its headquarters in Flagstaff, Ariz., by adopting the old-fashioned design philosophy of constantly striving to improve its products. An example is the Air Breeze, the latest addition to its best-selling Air range of small wind generators. By analyzing every element of the existing range to identify possible improvements, it has produced its quietest and most powerful turbine so far. The blades have been enlarged to start up in winds of just 6 miles per hour and to produce more energy — up to 200 watts at 28 m.p.h. — as well as being more durable. The system uses only two moving parts to minimize maintenance, and makes so little noise that it is generally quieter than the wind.
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