The efficient use of energy resources - both for economic and environmental reasons - will remain a top priority for the foreseeable future. Roger Legg's comprehensive treatment of air conditioning systems is devoted to ensuring that, when installed, they not only meet their design criteria but maximize energy efficiency. The book is intended for advanced students of environmental engineering, and design, commissioning and maintenance engineers in the building services industry. Using a specially-developed method of calculating energy consumption, it offers detailed, up-to-date techniques and procedures for the design, installation and maintenance of systems.