Refrigeration and Air Conditioning Technology 4E covers the fundamentals and practical applications for understanding and maintaining all heating and cooling systems. The comprehensive coverage of the basic theory, latest terminology, diagnostic methods, and repair procedures, combine to make this the most complete HVAC-R book available today. Advances in technology, procedures, and equipment are addressed throughout this new edition, with an increased emphasis on digital electronic controls and system efficiency. Certification and safety coverage are also expanded upon in this new edition.