“…Indoor dust may settle on equipment that are heated during the intended use, e.g., electric heaters, light fixtures and electrical appliances. The temperature of electric heaters range from 80 to 300°C or more (Amundsen, 1992; Frydenlund, personal communication), and the surface temperature of light fixture is often in the range 110–160°C (Pedersen et al., 2003). The use of electric heating in residents is assumed to influence the health of occupants, suggestively by the release of submicron particles from heated dust (Krafthefer and MacPhaul, 1990; Raunemaa and Sammaljärvi, 1993; Sammaljärvi and Raunemaa, 1990).…”