The core activity of Heiz- und Regeltechnik Bernhard Hächler AG is the provision of services in the field of building technology, particularly in heat generation and distribution. Specifically, this includes: maintenance work on heating systems, troubleshooting on heating systems, optimization of heating systems, re-commissioning of heating systems, and partial replacement of complete heating systems. The company offers these services for various types of heating systems, including conventional oil and gas heating systems as well as alternative systems such as heat pumps, wood heating systems, and thermal solar systems.