Where is the use of wastewater energy legally regulated?

Wastewater energy meets the requirements of the German Building Energy Act (GEG) just as well as any other renewable energy source. Wastewater energy is defined as renewable energy in Germany and the EU. In Germany, this is laid out in the GEG. At EU level, wastewater heat has been recognized as renewable energy since 2018 under the Renewable Energy Directive (2018/2001/EU).

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