The Law on Saving Energy and Using Renewable Energies for Heating and Cooling in Buildings is the official title of this document. It replaces the Act for the Promotion of Renewable Energies in the Heat Sector (EEWärmeG), the Energy Conservation Act (Energieeinsparungsgesetz, EnEG), and the Energy Saving Ordinance (Energieinsparverordnung, EnEV). The new Buildings Energy Act lays forth specifications for how energy-efficient buildings must be, how energy performance certificates must be issued and used, and how renewable energy sources must be used in structures.
The Act was amended in 2022, and the change became effective at the start of 2023. The modified Act upped the requirements for new construction and lowered the yearly energy consumption cap from 75% to 55%.