Long-term monitoring of indoor air quality and controlled ventilation in public buildings.

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Kulmala V. et al.
air quality, carbon dioxide, controlled ventilation, mechanical ventilation, radon, school, pollutant, university, particulate
Year:
1984
Bibliographic info:
Indoor Air. Vol 5. Buildings, Ventilation and Thermal Climate. Edited by B Berglund, T Lindvall, J Sundell. Swedish Council for Building Research, 1984. 435-441, 4 figs, 23 refs.

Long-term monitoring of radon, aerosol and carbon dioxide concentrations was carried out in two Finnish public buildings. In each case, a distinct periodic behaviour of pollutant concentrations was observed. CO2 and aerosol showed maxima during the working hours, but the fluctuations of the aerosol concentration were faster and more irregular. The radon concentration peaked at night and on weekends, dropping off rapidly in the working day mornings when ventilation was turned on. Reasons for the concentration fluctuations are discussed shortly in terms of indoor sources and periodic ventilation. A case study of CO2-controlled ventilation was conducted in one of the buildings. The estimated daily energy savings were 13-20%, and no significant changes in the pollutant concentrations could be observed.

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