Natural ventilation in the UK and some considerations for energy efficient design.

This paper discusses the potential for achieving an "energy-efficient" ventilation system by improving design procedures for natural ventilation. It considers ventilation requirements and the meaning of the term energy-efficient ventilation. Both of these topics are of fundamental importance to any design procedure. Natural and mechanical ventilation systems are discussed. This is done because natural ventilation is often compared unfavourably with purpose-built mechanical systems. It is argued that such comparisons can be misleading, unless all aspects are considered. The basic characteristics of natural ventilation are summarised. Research in recent years has led to a considerable increase in knowledge of ventilation. This enables the main problems to be identified and indicates ways of improving design procedures.