Geoenergy is renewable energy stored in soil, bedrock and waterways. In Finland, most of this energy originates from the Sun and partly from the ground. Geoenergy can be utilised in heating and cooling buildings by using a heat pump. Planning and constructing a geoenergy system is a multi-stage project in which experts from different fields work in cooperation. GTK conducts geological and geophysical research to find out whether the target location is suitable for geoenergy production. GTK then uses the results from the field studies to accurately measure and model the energy field in order to create a durable and cost-efficient system.