H. FATZER AG is your expert for heating, ventilation, and sanitary systems. We design and install modern heating systems, energy-efficient ventilation solutions, and high-quality sanitary installations for residential, commercial, and industrial buildings. Whether new construction, renovation, or optimization – we provide complete solutions from planning to maintenance.

Sustech, as an independent engineering firm for energy and building technology, offers all services from energy consulting to planning and monitoring. We support builders in residential areas as well as in administration, schools, nursing homes, gastronomy, industry, and more. Our primary goal is to optimize sustainability and comfort. • GEAK • Energy Consulting • Building Physics • HVAC Planning • Fossil-Free Heating • Photovoltaic Planning