http://www.pacwind.net/
http://www.pacwind.net/news.html
jcms 100% 4 Votes
Other Answers (1)
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There%26#039;s the one that most people are familiar with which is the %26quot;fan%26quot; type,
then there is one with a verticle shaft where some look like a paddle wheel
on it%26#039;s side, there is also another type with a horizontal shaft which uses blades shaped like the double helix and is supposed to work especially well in city environments where, because of the buildings, winds have a tendency to go in all different directions. 0% 0 Votes
