Plants can be made especially efficient and economical by using the energy contained in waste to generate district heat, process heat or hot water. There is no need for high-investment, high-maintenance power generation equipment such as turbines. The boiler can be made smaller and more compact, additionally reducing the investment and the space required. Depending on the situation on site, the heat can either be fed into a district heating network or made available for industrial applications in the form of process steam or hot water. A design with full redundancy assures a safe and reliable supply of heat and energy around the clock and throughout the year, with the customer’s mass flow rate, temperature and pressure requirements met dependably at all times. This EfW approach offers the best value for money in situations where consistently high volumes of heat are required all year round, with plants delivering efficiency of up to 90%. By using additional heat exchange systems in the flue gas treatment unit, the net efficiency of the overall system can be increased even further, up to 99%. There is no doubt that the heat generation component of EfW plants will gain even greater importance, especially in countries that have set up well-used district heat networks and intend to move over from coal-fired power plants to renewable energy. Here, EfW closes a gap in heat generation resulting from the energy transition.