The Lämpöässä geothermal energy system is an entity which can heat and cool properties and also produce domestic hot water. The system is especially suitable for detached houses, terraced houses and blocks of flats. The geothermal energy system consists of heat collection circuit, ground source heat pump unit, heat distribution circuits, producing of domestic hot water. Cooling unit and solar collector can be added to the system also later. The Lämpöässä heat pump is an excellent heating solution for detached houses, townhouse apartments as well as apartment buildings. The Lämpöässä heat pumps are suitable for both new and renovated locations.