Field Studies on the Improvement of Indoor Air Quality by Installing Ventilation System in Apartment Houses

Ventilation system is being recommended as an effective tool to improve indoor air quality(IAQ) in apartment houses. Recently, in Korea, apartment house suppliers are required by lawto establish ventilation systems in apartment houses. In this study, improvement of IAQ byestablishing mechanical ventilation system in apartment houses was investigated through mock-up tests. Seven apartment houses were arranged for the test and concentrations of VOCs and Formaldehyde were examined under various conditions of ventilation rates and duct works. The results of this study show that IAQ of the test houses with mechanical ventilation system was improved from about 30% to 40% compared with IAQ in the apartment houses without ventilation system. However, there were no apparent concentration differences between the cases of changing ventilation rates and ductworks.