Many ambient pollutants are in particulate form arid there is a need to sample them for a variety of reasons. A wide range of samplers is available for different purposes but, unfortunately, there does not seem to be a very good understanding of the reasons governing the choice of samplers for different tasks. The present paper attempts to address some of these problems by reviewing briefly the types of sampler used for collecting airborne dust in the ambient atmosphere and the reasons for their choice.

Several case studies from the Iowa State University Extension show that carbon monoxide hazards exist even with new gas appliances. Proper installation and analysis are key to avoiding or solving these problems.

Air conditioning is often singled out as the main culprit in cases of sick building syndrome, but as Timothy Southfield explains, users need to get their houses in order.

The paper describes the characteristics of different types of pollutant sources in the way that they are experienced in a fixed locality in an urban area. The locality in this sense can also be a building or part of a building (a ventilation inlet for example). The most important parameter is the distance of the polluting source and therefore the characteristic features of sources at different distances are discussed.

The objective of this one-day seminar was to address the issues of design and provision of low energy ventilation strategies for non-domestic buildings located in urban and city centres where external air and noise pollution may be of prime concern. Current concerns about energy usage and C02 emissions have led to an increasing number of buildings, both new builds and major refurbishments, employing low-energy ventilation strategies such as natural or fan-assisted ventilation.