Wind turbine design from Down Under

From Australia comes a wind turbine electrical generator that is cheap and easy to install.

Designed to be placed at a home's roof peak, where wind speed is greatest, it supposedly could be sold for as little as 700 Australian dollars, or about $450 U.S.

The disadvantage to this kind of wind turbine is it has to be situated in the direction of the wind to gain maximum efficiency. For many East/West facing houses (at least in the Midwest) that is not a problem, because of prevailing wind patterns. If my house was facing South, it would generate less power.

Here's the video: