This text covers the fundamental science and design principles of air conditioning engineering for the student and professional alike. The author uses his experience as a lecturer to present the material in a logical and accessible manner, always introducing new techniques and ideas with the use of worked examples. This new edition has been updated to provide greater coverage of developments in safety, hygiene and reduced energy consumption. The use of computerized controls is emphasized and recent advances in refrigeration are considered.;An ELBS/LPBB edition is available.