12-22 North Street is a state-of-the-art, ultra energy-efficient co-working space with a mission of developing renewable energy technologies while providing invigorating workspaces for emerging green businesses. Built in 1980 this building was designed as a passive solar and energy-efficient building. However, due to poorly designed remodels, the energy savings from its initial design became a hazard, leaving the top floor vacant for a decade. In 2004 we purchased the building and gave it a much needed face-lift, including installing Burlington’s first commercial photovoltaic solar array on the roof. In 2012 we installed the infrastructure for Burlington’s first smart microgrid including an electric water heater, relays to control LED lighting, electronic submetering, and ductwork and fans for night ventilation.