‘When unflued gas heaters are operating, indoor air generally exhibits substantially higher levels of nitrogen dioxide, carbon dioxide and carbon monoxide than the highest concentrations measured in ambient air in Australia.'
SOURCE: Department for the Environment and Water Resources
In a UGA study, “In a significant number of houses, pollutant levels abated slowly after the unflued gas heaters were switched off, indicating low ventilation rates”
SOURCE: Department for the Environment and Water Resources
