Air change efficiency of room ventilation unitsMikola, Alo; Rehand, Juhan; Kurnitski, JarekE3S Web of Conferences : CLIMA 2019 Congress, Bucharest, Romania, May 26-29, 20192019 / art. 01017, 8 p https://doi.org/10.1051/e3sconf/201911101017 Conference proceedings at Scopus Article at Scopus