Carbon Dioxide Monitoring: IAQ Indicator or Just Another

Carbon dioxide (CO2) concentration has been and continues to be widely used as a surrogate indicator of indoor air quality (IAQ) in buildings, and the use of CO2 measurements as a diagnostic tool in evaluating the performance and condition of HVAC systems is expanding. It had been suggested by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) that comfort criteria, described as the absence of odors, are likely to be satisfied when the concentration of CO2 is below a certain threshold level. However, this use of CO2 monitoring has been under increasing criticism in recent years. Read More