INDOOR AIR-POLLUTION BY DIFFERENT HEATING-SYSTEMS - COAL BURNING, OPEN FIREPLACE AND CENTRAL HEATING

Investigations of indoor air pollution by different heating systems in private homes are described. Sixteen homes, 7 with coal burning, 1 wi th open fireplace (wood burning) and 8 with central heating have been investigated. We measured the concentrations of carbon monoxide, carbo n dioxide and sedimented dust in indoor air, of total suspended partic ulates, heavy metals and of polycyclic aromatic hydrocarbons in indoor and outdoor air. Measurements were taken during winter (heating perio d) and during summer (non-heating period). Generally, we found higher indoor air pollution in homes with coal burning and open fireplace tha n in homes with central heating. Especially, the concentrations of car bon monoxide, sedimented dust and of some heavy metals were higher. In one case, we found also high indoor air pollution in a home with cent ral heating. This apartment is on the ground floor of a block of flats , and the central heating system in the basement showed a malfunctioni ng of the exhaust system.