standard

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.

Increasing air-tightness of houses in Canada in recent years, and related concern over indoor air quality and excessive humidity in winter, has led to provisions in the National Building code of Canada for mechanical ventilation systems in all new selfcontained