This edition reflects the latest results of research sponsored by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) and the continued development of ASHRAE standards regarding indoor air quality, comfort and refrigerants. The chapter on air-conditioning systems has been revised--increased emphasis has been placed on control of HVAC systems by adding more explanation of control theory and more detailed illustrations of typical systems and control. Data and references have been completely updated. Existing problems have been revised and new ones added.
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