Safe CO₂ threshold limits for indoor long-range airborne transmission control of COVID-19.

ABSTRACT: CO₂-based infection risk monitoring is highly recommended during the current COVID-19 pandemic. However, the CO₂ monitoring thresholds proposed in the literature are mainly for spaces with fixed occupants. Determining CO₂ threshold is challenging in spaces with changing occupancy due to the co-existence of quanta and CO₂ remaining from previous occupants. Here, we propose a new calculation framework for deriving safe excess CO₂ thresholds (above outdoor level), C _t, for various spaces with fixed/changing occupancy and analyze the uncertainty involved. We categorized common indoor spaces into three scenarios based on their occupancy conditions, e.g., fixed or varying infection ratios (infectors/occupants). We proved th

SUBMITTER: Lyu X 

PROVIDER: S-EPMC9801696 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature