Designed to produce energy in very low winds, Skystream 3.7™ begins producing power in an 8 mph breeze with full output achieved at 29 mph. Skystream may produce 400 kWh per month. That is 40 - 80% of the electrical needs of most homes. → wind turbine info

Windward ...
"With so many issues around global warming, I wondered what I could do to impact the environment in a measurable way, besides activities like recycling and installing compact fluorescent light bulbs. I was hoping that something would come along to help a homeowner take advantage of natural wind resources. It’s been a lifetime dream of mine. Until now there was not a technology that made this possible. With Skystream, now it is possible. " - Rena from Illinois