B066 IAQ sampling locations

Choices of sampling locations for assessment of air pollutant exposure concentrations in an open-plan office of Hong Kong

Brief:

Selection of measurement locations for Indoor Air Quality (IAQ) assessment affects the assessment uncertainties and measurement efforts. In this study, uncertainties of IAQ assessment results of exposure concentrations of carbon dioxide (CO₂) in a typical air-conditioned office were examined against the choices of sampling locations by (1) random choices and (2) recommendations of professional IAQ assessors. A one-year measurement result of the spatial indoor CO₂ concentrations in an open-plan office was used as a basis to investigate the probable errors due to the choices of sampling locations. Compared with random choices, assessment accuracy would be significantly improved by professional judgment at certain engineering acceptable error limits. Moreover, an assessor group with higher academic level would compose a choice leaning towards more accurate selection of sampling locations and assessment results. This study provides useful information for further investigations into the uncertainties of IAQ assessment results involving professional choices of sampling locations.

Further Information:

Mui KW, Wong LT, Hui PS, 2008. Choices of sampling locations for assessment of air pollutant exposure concentrations in an open-plan office of Hong Kong, The 11^th International Conference on Indoor Air Quality and Climate, 17-22 August, Copenhagen, Denmark, Paper ID 19.