Heating is a technological process, in which thermal energy is supplied to compensate energy losses of a building, and also to maintain the desired temperature in the building (when the desired interior temperature is higher than the ambient one).
Thermal losses of buildings are not affected only by the thermal difference between the indoor and outdoor areas, but also by insulation of the walls, location of the building, its shape and its structural arrangement. By definition, it is evident that in addition to the set temperature in the building, there are further control variables as the outdoor temperature and time.
Heat control is influenced by many factors:
Thermal output control can be performed by:
Domestic hot water (DHW) supply is also very often a part of the heating system of a building. If the source of DHW is local, then its control should be a part of the building or heat control management system.