Survey of unsatisfactory levels of airborne bacteria in air-conditioned offices

The level of indoor bacteria can be used as a referent to identify the performance of an HVAC system. For that study, a statistical model is proposed for the obtention of the office probable failure rate over a region. From a dataset of levels in 290 Hong Kong offices , model parameters have been determined. Another district survey in nine major Hong Kong commercial districts allowed the validation of the model. The comparison of the observed office failure rate of each district with the corresponding model estimate was carried out and consistent results were found..