Vertical WindSpire Turbine Promises 100% Energy [used by avg. household]

At a height of 30 ft. tall and only 2 feet wide, the WindSpire converts wind energy into measurable electricity through a vertical design, a rotor/generator system (with a low speed giromill and rotating ‘air core’ motors), and a wireless modem that an owner can track on a computer. It produces about 1900 kilowatt hours per year in 12 mile per hour average winds, which is about a quarter of the total energy used by a regular U.S. house.

But the key promise mentioned in the video, is that if the spire was twice as thick, it could likely produce 100% of the energy needs of a household.