This book comprehensively explains the fundamentals of the theory and measurement of natural ventilation, as well as the current state of knowledge and how this can be applied to design. The book also relates theoretical and experimental techniques to problems faced by designers. Particular attention is given to the limitations of the various techniques and the associated uncertainties. This comprehensive account of the fundamentals for natural ventilation design will be invaluable to undergraduates and postgraduates who wish to gain an understanding of the topic for the purpose of research or design. The book should also provide a useful source of reference for more experienced practitioners in industry and architecture.