Nearly zero energy renovation concepts for apartment buildingsKuusk, Kalle; Naumann, Jens; Gritzki, Anina; Felsmann, Clemens; De Carli, Michele; Kurnitski, JarekE3S Web of Conferences : 12th Nordic Symposium on Building Physics (NSB 2020) : Tallinn, Estonia, September 6-9, 20202020 / art. 18009, https://doi.org/10.1051/e3sconf/202017218009 Conference proceedings at Scopus Article at Scopus Article at WOS