Common electric meters are well developed electromechanical devices with little or no intelligence. The electric utility industry requires extensive load survey data to plan for future power generation needs and to prove the efficacy of utility-supported conservation programs. Customers would benefit from the same data, to assess energy usage and to detect and diagnose equipment faults. The Building Technology Program has joined the Laboratory for Electromagnetic and Electronic Systems at MIT to design and develop a meter that can separate loads from measurements made at a single point within a commercial building, to reduce or eliminate the need for expensive submetering of individual pieces of equipment.