Primary energy savings in cogeneration plants is recalculated (WK-intern) - New efficiency reference values for high-efficiency criteria and the adaptation of certain correction factors for high efficiency Proof have led to changes in primary energy savings of CHP plants compared to uncoupled systems. Since 1 January 2016 new harmonized efficiency reference values for the separate production of electricity and heat will have to be set from January 1rst 2016 to demonstrate their high efficiency. Largely unnoticed by the public, the European Union (EU) decided that the EU Regulation 2015/2402 should be in effect from the 12th October 2015. The delegated regulation is applicable