The Pacific Northwest National Laboratory (PNNL) is measuring the performance of seven LEED (U.S. Green Building Council’s Leadership in Energy and Environmental Design) certified buildings compared to seven “matched pairs” at different Air Force bases . Matched pair buildings were selected based on location, building function, size, and occupancy. Previous studies have indicated that on average, sustainably designed buildings use less energy and water, have lower maintenance costs, the occupants are more satisfied, and the occupant commute has lower emissions than typically designed buildings.