IT blog "Geektimes", article:
"Electrostatic air cleaning rooms from radon
Technical conference "Party Hard!
"The electrostatic filter as a device to clean the air from radon
in the living and domestic buildings."
Scientific Conference: "Chernobyl:
30 years later":
"Applicability of electrostatic collection method for removal
daughter decay products
of radon and thoron from indoor air."
PDF file (page 317)