Frei, Beat, Heinrich Huber, Moritz Bienz, and Kevin Bucheli. ‚ÄúDetermination of Ventilation Effectiveness With Tracer Gas Methods under COVID-19 Conditions‚ÄĚ. CLIMA 2022 conference (May 16, 2022). Accessed November 30, 2023. https://proceedings.open.tudelft.nl/clima2022/article/view/199.