자연환기 및 공기청정기 가동에 따른 실내공기질 분석

This study analyzed the concentration reduction effects of particulate matters (e.g., PM10 and PM2.5) and indoor air pollutants (e.g., CO2, TVOC, Radon) according to the operation conditions of an air-cleaner and natural ventilation through windows in a small office. As results, the daily average concentrations of PM10 and PM2.5 decreased into 0.2 μg/m3 from 1.6 μg/㎥ when the air-cleaner was in operation along with all windows closed during holidays. Under the conditions of natural ventilation with the windows opened during weekdays, the concentrations of Radon significantly decreased up to 0.2 pCi/lfrom 3.7 pCi/l. However, the daily average concentrations of PM10 increased almost double up to 74.7 μg/㎥ from 30.5 μg/㎥ and PM2.5 increased up to 40.9 μg/㎥ from 21.5 μg/㎥ as well even though the air-cleaner was in operation. Consequently, when it comes to improving indoor air quality, it is important to timely operate ventilation (natural or mechanical) systems as well as air-cleaner(s) depending on the concentrations of measured indoor and outdoor air pollutants.