Air leakages in air handling units with rotary heat exchanger : estimating extract air tansfer to supply air flowSimson, Raimo; Võsa, Karl-Villem; Kiil, Martin; Mikola, Alo; Kurnitski, JarekHealthy Buildings America 2021, Honolulu, Hawaii, USA, January 18-20, 2022 : virtual format2022 / 2 p. : ill https://hb2021-america.exordo.com/files/papers/309/final_draft/HB2021_AHU_air_leakages.pdf Assessment of SARS-CoV-2 transmission in room with mixing ventilationusing CO2 tracer gas techniqueSimson, Raimo; Kiil, Martin; Võsa, Karl-Villem; Kesküll, Andre; Kurnitski, JarekHealthy Buildings America 2021, Honolulu, Hawaii, USA, January 18-20, 2022 : virtual format2022 / 2 p. : ill https://hb2021-america.exordo.com/files/papers/397/final_draft/HB2021_SARS-CoV-2_infection_risk.pdf