Good Indoor Air Quality (IAQ) is important to ensure improved performance and productivity of students
and teachers. Research was conducted at three selected schools in semiurban areas of Bandar Baru Bangi
and Putrajaya, Malaysia to investigate the influence of the local surroundings on the IAQ in the school
classrooms. The concentrations of gas pollutants (CO, CO2) and particulate matter (PM) (PM10, PM2.5 and
PM1) have been determined using automatic portable indoor air spectrometers. The results show that the
overall average concentrations of the main parameters recorded inside the schools were 31 mg m3
(PM10), 18 mg m3 (PM2.5), 16 mg m3 (PM1), 502 ppm (CO2) and 0.3 ppm (CO). These concentrations were
still below the recommended values suggested by the Malaysian Department of Safety and Health
(DOSH), the Singapore National Environmental Agency (NEA) and the Hong Kong IAQ Guidelines for
Offices and Public Places. In most cases, there were significant correlations (p < 0.01) between air pollutants
and meteorological factors such as temperature and relative humidity in the classrooms. The
results of Indoor/Outdoor (I/O) ratios demonstrated that the concentration of indoor air pollutants in
different classrooms was not necessarily influenced by outdoor air pollutants.
Good Indoor Air Quality (IAQ) is important to ensure improved performance and productivity of studentsand teachers. Research was conducted at three selected schools in semiurban areas of Bandar Baru Bangiand Putrajaya, Malaysia to investigate the influence of the local surroundings on the IAQ in the schoolclassrooms. The concentrations of gas pollutants (CO, CO2) and particulate matter (PM) (PM10, PM2.5 andPM1) have been determined using automatic portable indoor air spectrometers. The results show that theoverall average concentrations of the main parameters recorded inside the schools were 31 mg m3(PM10), 18 mg m3 (PM2.5), 16 mg m3 (PM1), 502 ppm (CO2) and 0.3 ppm (CO). These concentrations werestill below the recommended values suggested by the Malaysian Department of Safety and Health(DOSH), the Singapore National Environmental Agency (NEA) and the Hong Kong IAQ Guidelines forOffices and Public Places. In most cases, there were significant correlations (p < 0.01) between air pollutantsand meteorological factors such as temperature and relative humidity in the classrooms. Theresults of Indoor/Outdoor (I/O) ratios demonstrated that the concentration of indoor air pollutants indifferent classrooms was not necessarily influenced by outdoor air pollutants.
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