Volatile organic compounds (VOC) in the Swedish housing stock.

Measurements of VOC, formaldehyde, temperature, relative humidity, ventilation and inspections of humidity related problems were made in 178 randomly selected Swedish dwellings. More than one hundred single VOCs was identified with a mean concentration less than 25 μg/m3. The concentration of 80% of the identified VO Cs were less than 10 μg/m3. One-family houses had a higher concentration of VOCs than multi family houses. Building period, type of ventilation system and indications of humidity related problems in the dwelling did not correlate with the concentration of VOCs to any larger extent. Relative humidity in indoor air were positively correlated to some VOCs, however, temperature and ventilation rate was not correlated to VOCs.