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2 International Journal of Occupational Medicine and Environmental Health

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Indoor air particles in office buildings with suspected indoor air problems in the Helsinki area

100%

Lappalainen S. , Salonen H. , Salmi K. , Reijula K.

International Journal of Occupational Medicine and Environmental Health

2013

tom 26

nr 1

155-164

Objectives: Airborne particle concentrations can be used as quality indicators of indoor environments. The previous lack of reference data has limited the use of particle measurements in offi ce environments. The aim of this study was to describe the concentrations of airborne particles (≥ 0.5 μm and ≥ 5.0 μm) in 122 Finnish offi ce buildings with suspected indoor air problems. Materials and Methods: The database consisted of indoor air and supply air particle samples collected in 2001–2006 from the Helsinki area. The particle concentrations (≥ 0.5 μm and ≥ 5.0 μm) were measured in the indoor air (528 samples from 122 offi ce rooms) and in the supply air (384 samples from 105 offi ce rooms) with an optical particle counter. Airborne particle concentrations ≥ 0.5 μm were categorized according to the effi ciency of supply air fi ltration and health survey data. Results: The mean concentrations in the indoor air equaled 1900 particles/l and in the supply air 1300 particles/l. The effi ciency of supply air fi ltration decreased the fi ne particles counts in both the indoor and supply air. The counts of large particles, ≥ 5.0 μm, were low in the indoor air. Airborne counts of ≥ 0.5 μm particles (geometric mean) were statistically higher in the offi ces whose occupants had work-related symptoms (eye and/or upper respiratory symptoms or upper respiratory infections) than in the offi ces whose occupants had no such symptoms. However, the symptoms may also be linked to other indoor air problems or particle characteristics not studied in this work. Conclusions: This study indicates typical airborne particle levels (≥ 0.5 μm and ≥ 5.0 μm) in Finnish offi ce buildings with suspected indoor air problems. The results can be used to evaluate the quality of indoor environment, possible indoor air problems, and the need for additional investigations.

Perceived indoor air quality and psychosocial work environment in office, school and health care environments in Finland

75%

Tähtinen K. , Remes J. , Karvala K. , Salmi K. , Lahtinen M. , Reijula K.

International Journal of Occupational Medicine and Environmental Health

2020

tom 33

nr 4

479-495

ObjectivesThe study examined the extent and prevalence of perceived indoor environment-related (IE-related) symptoms environmental complaints and psychosocial work environmental factors in Finnish office, school and health care environments.Material and MethodsThe data were collected from non-industrial workplaces (N = 455) in 2011–2012 and 2015–2017 using the Finnish Institute of Occupational Health’s Indoor Air Questionnaire (IA Questionnaire). Suspicion of IE-related problems was reported in 59% of workplaces. The data consisted of 28 826 employees’ responses.ResultsThe employees reported symptoms and environmental discomfort in office environments less often than in school or health care environments. The most often reported IE-related complaints were stuffy air (39% of respondents), dry air (34%) and insufficient ventilation (33%). The most often reported symptoms were irritation of the nose (27% of respondents), irritation of the eyes (26%), and hoarse or dry throat (24%). The results showed differences between the perceived IE in office, school and health care environments.ConclusionsCompared to earlier findings, the most often perceived IE-related symptoms and complaints have increased in Finnish health care environments. The office employees’ perceptions of psychosocial work environment remained fairly unchanged whereas health care personnel more often assessed their psychosocial environment as positive compared to previous reports. Instead of exact reference values, comparing the results of IA Questionnaires with the distributions and mean values of the results of this study may be more informative for those striving to solve IE-related problems. The presented distribution and mean values of perceived symptoms, environmental complaints and psychosocial work environment might help to relate the results to other workplaces. This, in turn, might increase the understanding that IA Questionnaire results are influenced by many factors. The results presented can be used as new reference material when interpreting the results of IA Questionnaires in office, school and health care environments.