• ​U.S. Patent and Trademark Office Headquarters Campus, Alexandria, VA

    This 2.5-million-square-foot campus, which consolidates a 11,000 person workforce in five interconnected buildings, opened in 2003. The facility received Energy Star certification in 2007 after an extensive application process and monitoring and review of the buildings' performance. Significant energy-efficient features include a campus-wide chilled water loop, enthalpy wheel rotary air-to-air heat exchangers in each building that allow the recovery of energy from conditioned building exhaust air, high-efficiency motors with variable frequency drives, and state-of-the-art building and lighting controls.