ABSTRACT
Performance indicators are essential, not only for the assessment of ventilation in individual rooms or buildings, but also at a societal level in monitoring and directing governmental policy. At the latter macroscopic scale, ventilation performance indicators are useful for monitoring the evolution of the ventilation industry, and to define agreed targets or objectives for future research and technical development activities. Such data, when properly defined and validated, will be a useful tool for steering research programmes and economic development policy. The lack of reliable data on trends in energy technology parameters can be a major constraint in a decision-making process, and can thus hinder societal progress.
