Evaluation of professional choice of sampling locations for indoor air quality assessment

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19 Citations (Scopus)


The uncertainties of professional choice of 'representative' sampling locations for general indoor air quality (IAQ) assessment are reported from the perspective of probable errors deviated from the sample-spatial average pollutant concentration of an indoor environment. In this study, associations between the professional choices of the sampling locations and attributes of the assessors were examined to quantify the uncertainties of the IAQ assessment results for a typical air-conditioned office in Hong Kong. In particular, a long-term (one-year) measurement result of the spatial indoor carbon dioxide (CO2) concentrations in this office was used as a basis to investigate the probable errors due to the choices of sampling locations. Comparing with the random choices, the assessment accuracy with the expert choices would be significantly improved for coarse sampling point densities at certain engineering acceptable error limits. It was reported that the location choices and assessment accuracy would be significantly influenced by the academic background of the assessors. An assessor group with higher academic level would make a choice leaning towards more accurate assessment results. To avoid an inappropriate level of reliance on the assessment results, uncertainties must be quantified for IAQ assessment. This study provided a template for further investigations into the uncertainties of IAQ assessment results involving professional choice of 'representative' sampling locations and the results might be a useful reference for assessing indoor environment elsewhere.
Original languageEnglish
Pages (from-to)2900-2907
Number of pages8
JournalBuilding and Environment
Issue number8
Publication statusPublished - 1 Aug 2007


  • Expert judgment
  • Field measurement
  • Indoor air quality
  • Sampling location

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Environmental Engineering
  • Geography, Planning and Development


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