Evaluation of indoor air quality screening strategies: A step-wise approach for IAQ screening

Ling Tim Wong, Kwok Wai Mui, Tsz Wun Tsang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


Conducting a full indoor air quality (IAQ) assessment in air-conditioned offices requires large-scale material and manpower resources. However, an IAQ index can be adopted as a handy screening tool to identify any premises (with poor IAQ) that need more comprehensive IAQ assessments to prioritize IAQ improvements. This study proposes a step-wise IAQ screening protocol to facilitate its cost-effective management among building owners and managers. The effectiveness of three IAQ indices, namely θ1(with one parameter: CO2), θ2(with two parameters: CO2and respirable suspended particulates, RSP) and θ3(with three parameters: CO2, RSP, and total volatile organic compounds, TVOC) are evaluated. Compared in a pairwise manner with respect to the minimum satisfaction levels as stated in the IAQ Certification Scheme by the Hong Kong Environmental Protection Department, the results show that a screening test with more surrogate IAQ parameters is good at identifying both lower and higher risk groups for unsatisfactory IAQ, and thus offers higher resolution. Through the sensitivity and specificity for identifying IAQ problems, the effectiveness of alternative IAQ screening methods with different monitoring parameters is also reported.
Original languageEnglish
Article number1240
JournalInternational Journal of Environmental Research and Public Health
Issue number12
Publication statusPublished - 14 Dec 2016


  • Air-conditioned office
  • Assessment
  • Indoor air quality
  • Screening

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


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