Mitigation of elevated indoor radon gas resulting from underground air return usage

K. J. Kearfott, R. L. Metzger, K. R. Kraft, Keith Holbert

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Underground air returns have been found to be active transportation pathways for radon gas entry into homes. Several homes for which underground air returns were contributing to elevated indoor 222Rnc oncentrations were evaluated for possible mitigation. Two houses with such problems were successfully mitigated by inserting flexible ducts into the returns. In one of these houses, the initial mitigation attempt resulted in an exacerbation of the problem due to leakage of the ducting. This was solved by re-sleeving the returns using a stronger material. Mitigation of elevated indoor radon gas caused by use of underground air returns by inserting flexible ducts is not possible for all situations, especially those for which the returns are small, filled with debris, misaligned, or inaccessible.

Original languageEnglish (US)
Pages (from-to)674-680
Number of pages7
JournalHealth Physics
Issue number6
StatePublished - Dec 1992


  • 222Rni
  • Monitors
  • N door
  • Radioactivity
  • Radon
  • Radon

ASJC Scopus subject areas

  • Epidemiology
  • Radiology Nuclear Medicine and imaging
  • Health, Toxicology and Mutagenesis


Dive into the research topics of 'Mitigation of elevated indoor radon gas resulting from underground air return usage'. Together they form a unique fingerprint.

Cite this