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INDOOR AIR | VIRUS TRANSMISSION Why space volume matters in Covid-19 transmission Its not just ventilation that removes viable virus from indoor air. To understand the risk of transmission of Covid-19, the University of Nottinghams Benjamin Jones and Chris Iddon say other mechanisms that are dependent on the volume of a space have to be considered T here is a lot of focus on the role of ventilation in reducing the risk equivalent s-1 Steady state concentration 3 s-1 Viable virus steady-state concentration s-1 -1 3 3 s-1 s s-1 -1 s-1 42 June 2021 www.cibsejournal.com CIBSE June 21 pp42-44 Covid in the office Supp.indd 42 21/05/2021 17:55