The method of increasing the efficiency of heat and water supply systems by using apartment individual heating unit describes in this article Apartment individual heating unit is a prefabricated module, which could be put in or on the wall, modifying heat conductor, separate flows of heat conductor into heat system and into hot-water supply, and controls heat demands of this systems. Apartment individual heating unit makes possible not to use central hot-water supply. The article provides the overview of advantages of apartment individual heating unitover other alternative systems.