This publication is intended to provide guidance on the nature and characteristics of pollutants in the outdoor air and how this impacts on indoor air quality. In particular, the document summarises the available knowledge to provide designers with information that will help in locating their ventilation inlets to minimise cross contamination from a range of polluting sources.                   

Gives a brief account of some of the parameters that are important in understanding the interactions of the external environment with the indoor environment, in order to enable the development of low energy ventilation solutions for buildings in urban locations with regard to indoor air quality and thermal comfort. Also describes work that is being carried out at the Building Research Establishment Ltd (BRE) in the UK to address them.