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AeroVironment is developing what it calls Architectural Wind, a modular wind power generation system for placement on top of buildings.
AeroVironment has set up a few beta testing sites for its Architectural Wind system, including this installation on a concrete factory.
Windy City configurations
Aeorotecture is trying to bring wind-powered electricity to the Windy City. Here are the company's Aeroturbines, placed in a variety of configurations on top of a Chicago building.