Study on IAQ based demand controlled ventilation

Fresh air is one of the most important affecting factors for air conditioning system. On one hand, it contributes to good indoor air quality (IAQ). On the other hand, it partly determines the energy consumption of air conditioning system. This paper focuses on the study of IAQ based demand controlled ventilation (DCV) in which CO2 concentration is used as the controlling index of human produced contamination due to the fact that human beings is the main source of indoor CO2, and TVOC concentration is used as the controlling index of building produced contamination. The study shows IAQ based DCV effectively lead to a good IAQ.