Abstract: A complete system for installation within a house, and which heats the house in winter, cools it in summer, provides a hot and cold water supply throughout the year and all its electrical appliances; the system in one design includes a gasoline engine connected to an electrical generator, the cooling system of the engine and the exhaust gases from the engine delivering heat to heaters in an air duct and in a water boiler; and the generator developing electrical energy to a heating coil in the air duct, supplies energy to a cooling system connected to a cooling unit inside the air duct and a cooler located along the cold water supply of the house, and also is connected to the house electrical wiring so to provide electric power thereto.