Criteria for NZEBR technologies and solutions

IEE NeZeR-project (2014-2017) promotes the implementation and smart integration of Nearly Zero Energy Building Renovation (NZEBR) measures in the European renovation market by increasing knowledge of NZEBR concepts and benefits among institutional housing owners and in the whole building chain. This paper summarizes part of the results of the NEZER project focused on the development of energy efficient intervention packages for residential buildings under NZEB criteria. Because of the high energy saving potential of the building stock constructed between 1960-1980, the project targets the renovation of multifamily blocks since they are the most representative ones and with higher replication potential. Firstly, best available renovation solutions to reduce energy use and increase renewable energy sources share (RES) are gathered and analysed for optimal energy efficient renovation. Secondly, successful NZEBR best cases around Europe are presented to finally, design a NZEB renovation criteria for multifamily buildings. In order to reach energy saving objectives, packaged solutions for three renovation levels and four climatic zones have been defined.