Chemical and sensory emissions from HVAC components and ducts.

Used a trained sensory panel and chemical and microbial measurements to examine the odour generation of the various components of air handling units. States that the results revealed that the supply air perceived air quality can be affected by the system. Nearly all the components of the system were sources of pollution, with used fibre filters the worst, although there were significant differences between the different components. Oily, dusty and dirty surfaces were the worst sources. Increasing the airflow did not improve the perceived air quality downstream of the components. States that chemical analysis proved unhelpful due to low concentrations of pollutants. There was no correlation between chemical emissions and perceived odour.