This, the fifth survey, is based on summaries received from researchers following the distribution of a survey form (Appendix A) to organisations thought likely to be involved in air infiltration and indoor air quality research.

This revised Technical Note brings together the current updated standards from 13 AIVC participating countries and adds the key standards on the subject from 1 non AIVC country together with those from other International Organisations. The more pertinent aspects of the standards and regulations are reviewed and a subject analysis is shown in tabular form (see Table 1.) covering the airtightness and ventilation requirements of the various countries.