The new Melittaklinik was designed for a high degree of efficiency in the use of resources right from the planning phase. The building was insulated according to the latest technical possibilities and uses state-of-the-art technologies to cover its own electrical and thermal energy requirements. The use of efficient electrical machines and liquid-cooled or -heated ceilings reduces the average annual demand for electrical power to 240kW for the entire building. Two thirds of the required energy is covered by the photovoltaic system, the combined heat and power unit and the solar thermal system for self-consumption, which generate approx. 400,000 kWh of electrical energy and approx. 600,000 kWh of thermal energy combined per year. The effective load on the public grid is thus only about 80kW, or about 20 households.