Type of ventilation system in office buildings and sick building syndrome.

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.