Open AccessInvestigation of Indoor Air Quality in six office buildings in Chengdu, China based on continuous monitoring data
Author(s) -
Yang Qiu,
Tang Ya
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/609/4/042032
Subject(s) - indoor air quality , environmental science , china , air quality index , ventilation (architecture) , air pollution , environmental health , environmental engineering , geography , environmental protection , environmental planning , meteorology , archaeology , medicine , chemistry , organic chemistry
Indoor air pollution is of a growing concern in China. The nation’s growing urban work force spends prolonged periods in office, thus office indoor air quality (IAQ) can be a key determinant of worker’s wellbeing, yet, IAQ literature on China’s office space remains scarce. To address such knowledge gap, this study conducted continuous monitoring in six office towers in Chengdu, China to investigate two major indoor pollutants: PM 2.5 and CO 2 . The participating office buildings were Grade-A certified and fully occupied. Indoor concentration for PM 2.5 and CO 2 ranged between 1-459 μg/m 3 and 375-1102 ppm respectively, with considerable intra-building and inter-building variability. Time-series analysis suggests diurnal and weekly pattern for indoor CO 2 , and temporal association between indoor and ambient PM 2.5 . Filtration and ventilation efficiencies varied across buildings, and these buildings experienced various degrees of penetration by outdoor PM 2.5 and indoor accumulation of CO 2 on a daily basis. On days with ambient pollution, indoor pollution persisted. Multivariate model predicts an average of 0.6 μg/m 3 increase in indoor PM 2.5 for every 1 μg/m 3 increase in ambient PM 2.5 . To our knowledge, this is the first systematic study of office buildings in China with findings potentially inform future IAQ management strategies.