Specialist information: New rules on energy efficiency and renewable energy

The German regulations governing the energy efficiency of buildings and the building technology installed in them (Energieeinsparverordnung, or EnEV) were further tightened on 1 October 2009. This new version, EnEV 2009, applies to building projects for which the developer or owner submitted a building application or notice of building works on or after 1 October 2009. EnEV 2009 specifically promotes...