The renovations incorporated a variety of sustainability strategies, including installation of a 255-kilowatt photovoltaic (PV) solar panel array that meets up to 85 percent of the building’s electricity needs, an economical heating/cooling system that incorporates cool bay air, radiant-floor heating, enhanced building insulation, and high-efficiency lighting. Installation of a large PV solar system on a highly visible historic landmark required extensive negotiations with the National Park Service and the California Office of Historic Preservation. The low-profile mounted PV system selected is in keeping with the industrial character of the historic structure. The renovations complied with the National Park Service's sustainability guidelines