Abstract
Well-functioning ventilation is critical for healthy indoor environments. In this study, carbon dioxide (CO2) was continuously measured to assess ventilation performance before and after a major renovation campaign involving 48 school buildings. A novel method was developed to identify build-up and decay periods from the data. Two metrics were then investigated: air change rates (ACRs), which were calculated using build-up and decay periods, and daily maximum concentrations (DMCs) of CO2 measured during school days. Multiple paired samples t-tests revealed statistically significant changes following the renovations: an increase of ACRs and a decrease of DMCs. This study highlights the feasibility, benefits, and scalability of continuously measuring CO2 to investigate ventilation performance in schools.
Published Version
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