Table 2: Minimum and maximum values, geometric means, and geometric standard deviations for the total number concentration of general aerosol ( 𝐶 𝑁 g e n (tot)), geometric mean of number size distribution of general aerosol ( 𝑑 G M ), number fractions of particles smaller than 10 nm ( 𝑥 g e n (<10)) and smaller than 20 nm ( 𝑥 g e n (<20)), radon activity concentration ( 𝐶 𝐴 R n ), equilibrium equivalent concentration of radon short-lived decay products ( 𝐶 𝐴 R n D P ), equilibrium factor between radon and radon short-lived decay products ( 𝐹 ), activity fraction of the unattached radon short-lived decay products ( 𝑓 u n ), and number fraction of the unattached radon short-lived decay products ( 𝑥 u n ), for the entire period of measurements indoors (28–31 October, 21-22 November, and 5-6 January), only when the door and window were closed and without any human activity.

Parameter28 October–6 January
minmaxGMGSD

𝐶 N g e n (tot)/cm−318401326051201.50
𝑑 G M /nm2287571.24
𝑥 g e n (<10)0.0010.300.012.63
𝑥 g e n (<20)0.0040.590.082.08
𝐶 A R n /Bq m−3288342291.96
𝐶 A R n D P /Bq m−3242781011.85
F0.240.670.431.24
𝑓 u n 0.090.280.161.30
𝑥 u n 0.080.360.171.45