Lawrence Berkeley National Laboratory

As ventilation systems become more sophisticated (or ‘smart’) standards and regulations are changing to accommodate their use. A key smart ventilation concept is to use controls to ventilate more at times it provides either an energy or IAQ advantage (or both) and less when it provides a disadvantage. This paper discusses the favorable contexts that exist in many countries, with regulations and standards proposing ‘performance-based approaches’ that both enable and reward smart ventilation. The paper gives an overview of such approaches from five countries. The common thread in all these methods is the use of metrics for the exposure to an indoor generated parameter (usually CO 2 ), and condensation risk. As the result, demand-control ventilation strategies (DCV) are widely and easily available on the market, with more than 20–30 systems available in some countries.