All thermally driven processes in malting plants and breweries require heat at a temperature on process level of
between 25 and 105°C (cf. Fig. 1). In an exergetic point of view it appears feasible to supply this heat at a
temperature level not higher than absolutely required for a certain process whereas in reality the design of the main
heat supply system is often determined by the process heat consumer which demands the highest temperature. In
order to reduce exergy losses and fossil fuel based CO2 emissions full exploitation of available heat recovery
potential, the cascade use of thermal energy as well as the integration of renewable heat supply technologies is
necessary.