| 요약2 |
Among various indoor air pollutants, radon is a ubiquitous and imperceptible substance that has long-term harmful effects on the human body; however, it can be effectively removed through indoor/outdoor air exchange. In this study, we collected data on the variations in indoor radon levels caused by airtightness performance, window opening, and bathroom exhaust fan operation. The levels of indoor radon fluctuated more irregularly in less airtight conditions, while the highest concentrations were observed in an apartment house with good airtightness performance (<1.5 ACH50). Opening the windows to allow for cross ventilation during the first hour of the experiment significantly increased the removal efficiency. The percentage of removal increases as the size of the window opening increases. Nevertheless, accidental variations in ventilation volumes brought on by weather-related factors, such as wind, temperature, and air pressure, makes this unmaintainable. The indoor radon levels of the entire apartment house did not significantly change when the bathroom exhaust fan was operating. Smaller areas, such as a single bedroom, can have their indoor radon concentrations reduced to less than 100 Bq/m3. This implies that in situations where the ventilation system is inadequate, the bathroom exhaust fan can function as a substitute instrument. |