Pollutants, odours and ventilation - sick buildings. Forurensninger, luktstoffer og ventilasjon - syke bygninger.

Despite having balanced mechanical ventilation, a large number of modern buildings in Sweden have unsatisfactory indoor climate. Problems include mould, irritation of the eyes, nose and throat, skin rashes, feelings of dryness, hoarseness andheadaches. To control ventilation according to requirements the right indicator variable must be selected and the system must permit the proper control in the occupied zones. Measurements of air pollutants were carried out outside and inside a mechanically ventilated office building. It protected its occupants well from external air pollution, but some internally generated pollutants were distributed within the building in unexpected ways.