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REHVA nZEB technical definition and system boundaries for nearly zero energy buildings

2013 revision for uniformed national implementation of EPBD recast prepared in cooperation with European standardization organization CEN

REHVA Report No. 4


Authors: Jarek Kurnitski (Ed.), Francis Allard, Derrick Braham, Dick van Dijk, Christian Feldmann, Jacquelyn Fox, Jonas Gräslund, Per Heiselberg, Frank Hovorka, Risto Kosonen, Jean Lebrun, Zoltán Magyar, Livio Mazzarella, Ivo Martinac, Vojislav Novakovic, Jorma Railio, Olli Seppänen, Igor Sartori, Johann Zirngibl, Michael Schmidt, Maija Virta, Karsten Voss, Åsa Wahlström


Publisher: REHVA (Federation of European Heating and Air-conditioning Associations)

Price: €30

Language: English



In this REHVA Report in cooperation with CEN, technical definitions and energy calculation principles for nearly zero energy buildings required in the implementation of the Energy performance of buildings directive recast are presented. This 2013 revision replaces 2011 version. These technical definitions and specifications were prepared in the level of detail to be suitable for the implementation in national building codes.




Technical definition for Nearly Zero Energy Buildings

Detailed system boundaries for delivered and exported and renewable energy calculation

Examples of energy flow calculations


Terms and definitions

National examples of low and nearly zero energy building definitions

Renewable energy captured by heat pumps from ambient heat sources