How to define nearly net zero energy buildings nZEB

Jarek Kurnitski, Francis Allard, Derrick Braham, Guillaume Goeders, Per Heiselberg, Lennart Jagemar, Risto Kosonen, Jean Lebrun, Livio Mazzarella, Jorma Railio, Olli Seppänen, Michael Schmidt, Maija VirtaPage