The control of radon progeny by air treatment devices

Markku Rajala, Kauko Janka, Matti Lehtimäki, Vesa Kulmala, Gunnar Graeffe, J. Keskinen

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)


The effect of air treatment devices on the behaviour of radon decay products has been studied in laboratory conditions. An HEPA filter and an electrostatic precipitator were used. Both of the filters were found to decrease the equilibrium factor of daughters and increase the unattached fraction of decay products. In a clean air they also decreased the activity of unattached daughters. The effect of the devices on the health risk caused by radon progeny was estimated by dosimetric calculations. The results corresponding to different models show considerable discrepancy, mainly due to different assumptions about the influence of unattached decay products on the dose.
Original languageEnglish
Pages (from-to)493-498
JournalScience of the Total Environment
Publication statusPublished - 1985
MoE publication typeA1 Journal article-refereed


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