Field measurement of PM2.5 concentration in office buildings

¹ Tokyo Institute of Technology, Tokyo, Japan
² Kogakuin University, Tokyo, Japan
³ Kindai University, Osaka, Japan
⁴ National Institute of Public Health, Saitama, Japan

^* Corresponding author: kagi.n.aa@m.titech.ac.jp

Abstract

The characterization of indoor PM_2.5 has been concerned about health effects. PM_2.5 in indoor air is affected by not only indoor emissions but also penetrations from outdoor air. Therefore, it is important for indoor PM_2.5 to take into account of penetration factors of PM_2.5 through air conditioning units in buildings. This study aimed at investigating PM_2.5 concentrations and I/O ratios (indoor/outdoor concentration) in office buildings. As a result, the relationships between PM_2.5 concentrations or I/O ratios and building characteristics could be classified as the types of buildings, such as specific or non-specific, and air conditioning units, such as the individual or central system. The I/O ratio for the specific buildings, over 3,000 m² of total floor area and buildings that had the central air conditioning unit was relatively low because of medium performance filter in air conditioning units.