This book provides a thorough and authoritative course on the basic and advanced principles of refrigeration and air conditioning. It contains all the most recent information and advances that are necessary to prepare the technician for todays world. It incorporates the latest technical changes and EPA rulings, covers the newer refrigerants, and provides current information on the recovery, reclaiming, and recycling of refrigerants. It contains basic information on numerous certification exams. This book presents all these principles in a very easily understood format.