NZEB and market-based renovation case study of an existing office buildingKuivjõgi, Helena; Kurnitski, Jarek; Uutar, Aivar; Thalfeldt, MartinE3S Web Conference: Cold Climate HVAC and Energy 20212021 / art. 05002, 7 p. : ill https://doi.org/10.1051/e3sconf/202124605002 Conference Proceedings at Scopus Article at Scopus Article at WOS