title: The reduction of indoor air concentrations of radon daughters without the use of ventilation.
abstract: The possibility of using filtration and electric fields both separately and in combination to reduce the indoor air concentrations of radon daughters is described in theoretical terms and with reference to investigations in experimental rooms. For energy conservation considerations these investigations were carried out without reducing the radon concentration by ventilation or other means. The importance of aerosols to the effectiveness of these methods is also described. It is demonstrated that it is possible by use of filtration rates of 3 - 4 times per hour to reduce the potential alpha energy concentration by a factor of 4 - 5. In case of low aerosol concentration the corresponding reduction in lung dose may be much smaller, depending upon the dose-exposure model used, due to the filtration-caused change in the partitioning of the radon daughters between the attached and un-attached states.
mesh_terms: D000388:Air / Q000032:analysis*; D004781:Environmental Exposure; D006798:Housing; D006801:Humans; D008834:Microclimate; D011886:Radon; D012306:Risk; D014691:Ventilation
chemical_list: D011886:Radon