physical activity

Indoor carbon dioxide (CO2) concentrations have been used in the fields of building ventilation and indoor air quality (IAQ) for decades. Specific applications include the estimation of ventilation rates, control of outdoor air ventilation rates based on indoor CO2 as an indicator of occupancy, and use of CO2 as an IAQ performance metric. All of these applications require values for the CO2 generation rates of the occupants of the space or building being considered. Human CO2 generation rates depend on their level of physical activity as well as their sex, age, and body size.