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.

Periodic or spot check measurements of indoor air quality (IAQ) parameters leave blanks in a building data profile upon which misleading or incomplete conclusions may be made. It is difficult and unwise to make decisions regarding IAQ diagnostics and corrective actions with limited data. Datalogging fills in the blanks left by periodic measurements to complete the profile thus making it a powerful tool for good building diagnostics.

This demonstration hosted by the Vale of White Horse District Council at Drayton, Oxfordshire, examined the type of building and occupancy pattern most likely to benefit from the installation of the current range of gas-fired condensing boilers. Specifically, the aims of the project were to examine the variations in space heating and domestic hot water load and the effect of building fabric insulation on these loads.