International journal of environmental research and public health
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Int J Environ Res Public Health · May 2020
Randomized Controlled TrialEffects of the Use of Air Purifier on Indoor Environment and Respiratory System among Healthy Adults.
Air purifiers have become popular among ordinary families. However, it remains controversial whether indoor air purification improves the respiratory health of healthy adults. A randomized crossover intervention study was conducted with 32 healthy individuals. ⋯ The air purification did not significantly improve the pulmonary function of the study subjects. In contrast, an increase in the indoor PM10-2.5 and O3 concentration led to a significant decrease in the forced expiratory volume in one second (FEV1.0)/forced vital capacity (FVC) and maximal mid-expiratory flow (MMEF), respectively. In conclusion, air purification slightly improved the indoor PM2.5 concentrations in ordinary homes but had no demonstrable impact on improving health.