Abstract
Human subjective reactions to indoor air pollution in the form of volatile organic compounds in five concentrations ⩽ mg m −3 were examined in a climate chamber under controlled conditions in a balanced experimental design. The reactions of 25 subjects were registered in two questionnaires containing 25 and six questions and on a linear analogue rating scale. Each subject was tested for one day including four runs in each of the five treatments of 50 min duration. Dose effects were found for perceived odour intensity at 3 mgm −3. Air quality, need for ventilation, irritation of eye and nose showed significant effect at 8 mg m −3. Significant reduced well being was reported at 25 mgm −3. The analyses indicated that lower threshold for some of these effects would have been found if more subjects or longer exposure-times had been used. Gender, age, occupational education and smoking habits were co-factors for many of the symptoms reported.
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