Indoor air quality and minimum ventilation.

Reviews important sources of indoor air pollutants, and discusses ways of measuring the contaminants emitted by the presence of man in a room. In a test chamber the carbon-dioxide and the odour intensity were measured as a function of room occupancy and ventilation rate. When the supply of fresh air was12-15m*3 per person per hour, the CO2 concentration was less then 0.15% and the odour intensity was evaluated only as a `slight annoyance'. Higher ventilation rates are necessary if increased physical activities and smoking is done in the rooms.