Ventilation Efficiency and Carbon Dioxide (CO2) Concentration

In animals metabolic processes, involve complex organic molecules being broken down to simpler molecules, such as carbon dioxide and water. Carbon dioxide waste is removed from the body through respiration. Carbon dioxide content in fresh air is approximately 400 parts per million. In this study, we investigate the relationship between ventilation efficiency and carbon dioxide (CO2) concentration. Carbon dioxide concentration can give an indication of the indoor air quality in indoor and enclosed environments. It serves as a measure of ventilation efficiency in areas where air-conditioning and mechanical ventilation is provided. Our survey of various enclosed environments indicate that CO2 levels may exceed the levels that have been suggested to cause occupants to grow drowsy, get headaches, or function at lower activity levels. Elevated levels of CO2 are observed in public transport when filled almost to capacity and these concentrations remain for long durations.