U.S. Environmental Protection Agency's National Vehicle and Fuel Emissions Laboratory, Ann Arbor, Michigan

This case study was prepared as one in a series for the Laboratories for the 21st Century program, a joint endeavor of the U.S. Environmental Protection Agency and the U.S. Department of Energy's Federal Energy Management Program. The goal of this program is to foster greater energy efficiency in new and retrofit laboratory buildings in both the public and the private sectors. Theenergy-efficient elements of the laboratory featured in this case study-EPA's National Vehicle and Fuel Emissions Laboratory, Ann Arbor, Michigan-include the addition of digital controls for heating and cooling equipment, variable-air-volume supply and exhaust systems, energy recovery systems, water conservation equipment, and the use of a fuel cell to supplement grid-supplied electricity with anonpolluting source of power. These features and upgrades were installed as part of an Energy Savings Performance Contract; the result has been a 60% drop in energy costs and a 50% reduction in domestic water use at the laboratory.