공조시스템의 오염 현황에 대한 실측

Air conditioning systems are indispensable in modem buildings. Therefore air conditioning systems play a main role in improving indoor air quality. However, there is not enough information about air duct contamination and any official maintenance standards or guidelines, for air duct maintenance does not exist in Korea. In this study, dust concentration and microorganisms between the upstream and the downstream of air filters and air duct were measured with particle counter and blood agar plates. Before and after duct cleaning out and after 45 days above items were measured at 4 points in each floor of building under actual operating conditions. As for the results, air duct contamination strongly influence on the indoor air quality. So proper maintenance of air duct should be carried out in the building. The aims of this study are proposal for air filter maintenance methods after installation and basic data about air duct maintenance guidelines or standards for operator.