Heating and cooling of the building
All heating and cooling occurs through concrete core activation of the ceilings. This method, which is also called concrete core temperature control, uses the capacity of the ceilings and/or walls of a building to store thermal energy and uses it to heat or cool rooms.
Water pipes were buried in the concrete of the ceilings at intervals of around 15 cm, which can heat or cool the concrete by means of the water flowing through. In winter, the circulating water is heated up to 23 C with the heat pump. This obviates the need for room-based heating control. If the water tanks were not be able to supply sufficient heat in periods of low outside temperatures, the gas heating provides additional heat. Per heating season, on average 20,000 kWh of waste heat can be recovered.
In summer the water of the concrete core activation is cooled back down via the tank water. In this way, pleasant room temperatures are achieved even without expensive and energy intensive climate control.