Optimal PI control parameters for accurate underfloor heating temperature controlKull, Tuule Mall; Thalfeldt, Martin; Kurnitski, JarekE3S Web of Conferences : CLIMA 2019 Congress, Bucharest, Romania, May 26-29, 20192019 / art. 01081, 8 p. : ill https://doi.org/10.1051/e3sconf/201911101081 Conference proceedings at Scopus Article at Scopus