Estimation of radon concentration in house using a simple ventilation model

The aim of this study is to evaluate the efficiency of different ventilation strategies for a house and fora subfloor void to reduce the radon concentration level of the indoor air.A steady-state analytical ventilation model is derived to estimate the indoor air radon concentration inhouses on ground floor or with subfloor voids. It enables to analyse the influence of differentenvironmental and construction parameters on this concentration, in a way to better define anddimension technical solutions to reduce radon concentration in indoor air.First main results obtained with this model are presented in this article. The model developped couldalso be a help to dimension natural ventilation of a void equiped with specific duct to use stackeffects.