Apparently unfazed by recent skepticism from local engineers and architects aimed at Mayor Bloomberg's plans to install wind turbines on Gotham's skyscrapers and bridges, California-based Marquiss Wind Power has offered to donate one of its turbine systems to the city in order to demonstrate that the Mayor's idea is in fact viable. The company's patented roof-top wind turbine is approximately 19 feet high and weighs less than a typical rooftop air conditioning unit. Its T500 model is optimized for low, variable wind, is rated at 5 kilowatts, and is priced between $30,000.00 and $60,000.00 depending on the specific configuration. According to Marquiss CEO Paul Misso, the company's turbines should pay for themselves within four to eight years, "depending on wind speed, utility rates, and available incentives." Last week, in the aftermath of Mr.