This paper presents a new computer program for nonintrusive disaggregation of the total electricity consumption of a house into the major end uses. The computer program has two modes: (1) sampling and (2) evaluation. In the sampling mode, the operating characteristics (of each end use are determined from data collected over a period of several days using at least one current sensor per appliance. In the evaluation mode, only the main electric entrance of the house is monitored, and the electric signal is analyzed to disaggregate the total energy consumption. The errors in estimating the energy shares of three major end uses (water heater, baseboard heater and refrigerator) are less than 10% for most evaluation scenarios.