Describes a cross sectional study carried out on 2678 employees in 41 office buildings in March 1991 aimed at examining the role of sick building syndrome symptoms. Concludes that the risk of the studied symptoms is related to the type of ventilation in the existing office building stock. Suggests that future studies should concentrate on the typical function problems and specific causes connected with the high-risk ventilation systems.
Based on the literature and our long-term investigations on indoor environment, the heat source patterns (distribution, location, size, etc) have a predominant effect on temperature efficiency as well as ventilation effectiveness. Although the heat sources of ventilated rooms are various and complicated in engineering practices, some typical characteristics still exist in common.
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