… national reference levels for indoor radon annual … radon action plan, which should include
promoting action to identify dwellings with radon concentrations exceeding the reference level…

… In the case of existing built spaces, the procedures allow, in a first phase, to assess the level
of indoor radon concentration, leading to decision-making on the measures to be applied, …

… In addition, the lifestyle or habits of the homeowners, in terms of shutting and opening
doors and windows is another factor that influences levels of indoor radon concentration (22). …

… own action level for indoor radon to reduce radon lung cancer risk. As a health concern like
indoor environment, radon … Different countries put different action levels at dwellings; Table 2 …

… with a passive radon sump system. The passive sump may be activated with an electric fan
when indoor radon concentration exceeds the Action Level. The Action Level is 100 Bq/m 3 …

… (RL) vary in different countries due to differences in regional levels of indoor radon and
usually range from 100 to 300 Bq m −3 . However, a reliable decision as to the compliance of …

… Recent studies suggest that there is no safe threshold for indoor radon exposure, as its …
reference levels [5,9]. The adopted reference level (RL) or action level (AL) for indoor radon vary …

… factors that strongly affect the indoor radon levels such as: indoor air-conditions, ventilation
… the indoor radon concentration and studied the seasonal variations of indoor radon levels to …

… concentration observed during the summer: with building material as the leading origin of
radon … If the values of indoor radon concentration registered are compared to the action level …

… higher radon levels than the US EPA action level concentration of … Winter and fall had
significantly higher indoor radon … with indoor radon concentration on the day a radon test occurred. …