Abstract: This invention generally relates to a system for estimating fuel consumption of a boiler in a building and to a method of estimating fuel consumption, in particular for estimating gas consumption. A system is disclosed for estimating fuel consumption of a boiler in a building, the system comprising at least boiler operating model configured to perform said estimating on the basis of at least one ON time of the boiler.

Abstract: A household energy management system uses measurements of the household electricity supply to identify and to determine the energy consumption of individual household appliances. From these measurements, models can be built of the behavior of the occupants of the house, the thermal properties of the house and the efficiency of the appliances. Using the models, the household appliances—in particular heating and cooling appliances—can be controlled to optimize energy efficiency; and maintenance programs for the appliances and for the house itself can be recommended to the householder or arranged with a service company.

Abstract: We describe a system to provide feedback to a user of an appliance for energy saving, the system comprising: means for monitoring an energy consumption of the appliance; means for inferring a mode of use of the appliance from said power consumption; and means for providing feedback to said user responsive to said inferred mode of use to indicate how an amount of energy used by said appliance may be reduced. In some embodiments the means for monitoring power consumption comprises means for identifying one or more periods of operation of the appliance from data representing aggregate power consumption of a plurality of devices including the appliance. In embodiments the means for monitoring the power consumption comprises means for monitoring mains electricity power consumption of the plurality of devices. Alternatively the means for monitoring the power consumption may comprise, for example, a plug-through power sensing device.

Abstract: A cell phone location-based system is described that determines the occupancy of a home and controls home energy consumption such that energy is saved when the home is unoccupied. Occupancy is determined according to cell phone locations, occupant behavior patterns, or burglar alarm status. When an occupant is determined to be returning to their unoccupied home, the heating or cooling apparatus is activated to return the temperature in the home to a comfortable level by the time the occupant arrives.