This book is designed to provide a complete, comprehensive treatment of heat pumps their fundamentals, performance, design, cost, and selection.This book attempts to be a complete reference/text book on heat pumps linking the fundamental principles of economics, thermodynamics, and Engineering Heat Transfer with current design, selection, and operating practices. Emphasis is placed on specific, practical methods and solutions-not broad generalizations. All the essential procedures are presented in step-by-step fashion to enable HVAC engineers, contractors, architects, and builders to design, size, and select Heat Pump Systems for Residential Buildingss and components. Example problems are included throughout which demonstrate fundamental principles, techniques of calculational procedures, and overall system analysis, design, and/or selection.The early chapters provide a combination of historical background and technical introduction to heat pumps, emphasizing the more common vapor- compression types, but including gas-fired versions, solar and geothermal units, and hybrid systems. The reader is then provided the necessary tools for sizing heat pumps, for estimating the energy use by such systems, and for determining life cycle costs. The book Concludes with a look at Developments underway today as well as possible future technologies.