Ventilation Rate for Improving Indoor Radon Level

Chan Ming-yin, Ho Hung-kit

Research output: Journal article publicationJournal articleAcademic researchpeer-review


This paper critically reviews ventilation rates for maintaining acceptable indoor radon levels. Eleven site measurements were conducted in habitat rooms of different buildings to investigate the relationships between acceptable indoor radon levels and optimum ventilation rates. The significance of building's age, geographical locations, height of the space and meteorological conditions on the indoor radon level accumulations were also investigated. Relationship between ratio of indoor-to-outdoor radon level and ventilation rate was worked out and a critical ventilation rate was recommended. The guidelines from ASHRAE standards matched with the identified critical ventilation rate. The results could serve as a rule of thumb for ventilation system design improving indoor radon pollution.
Original languageEnglish
Pages (from-to)329-335
Number of pages7
JournalArchitectural Science Review
Issue number4
Publication statusPublished - 1 Jan 2005


  • Granite
  • Indoor radon levels
  • Ventilation rate

ASJC Scopus subject areas

  • Architecture

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