The Fendesack company has been building geothermal systems for over 20 years. The size of the systems ranges from just one borehole for the private builder to large-scale systems with more than 100 boreholes. Our clients include private builders, installers and general construction companies as well as public clients. The extraction of geothermal energy via so-called swallowing fountains and surface collectors is also possible. Our specialist staff takes on the drilling and laying of geothermal probes.