Abstract
This paper reported the indoor air quality for airborne particles in buildings, houses and cleanrooms. First, the results of previous studies were discussed to demonstrate changes in indoor pollutants from the past to the future in buildings and residential houses. Since the 1950s, levels of certain indoor pollutants, such as particulate matter have decreased because of no smoking policy in buildings. The characteristics of airborne particles, especially PM2.5 in indoor environments were showed from previous studies for emission sources of fine particles and field measurements for indoor PM2.5. The size distribution of mass concentrations for indoor particle matter in buildings were shown that there were two peaks with diameters of 0.2-0.3 μm and 4 μm. The field measurements in residential houses for the characteristics of particle concentrations size distribution during cooking activities were also shown. Indoor PM2.5 concentration in the living room was increased by using the gas stove, toaster oven in the kitchen. Ultrafine particles with diameters in the range of 30-50 nm were generated by cooking. Finally, cleanroom cleanliness class used for industrial and biological cleanroom was shown.
