New to This Edition • • Updated information and charts to reflect current refrigeration use, including updates in chapters 10, 13, 14, 15, and 16. • • Added new sections on hydrofluro-olefin (HFO) and hydrocarbon (HC) refrigerants in chapter 13. • • Updated information on refrigerant cylinder colors in chapter 13. • • Updated information on refrigerant leak requirements and record-keeping requirements in chapter 15 to reflect the latest EPA requirements. • • Added new section on Electronic Expansion Valves (EEVs) in chapters 17 and 19. • • Added a new section on Electronically Commutated Motors (ECMs) in chapter 25. • • Added a new section on ductless mini-split systems in chapter 33. • • Common Cartridge®. This delivers the foundation and tools that improve student retention and facilitate instructor efficiency. For the student, G-W Common Cartridge provides an eBook with text-to-speech capabilities, highlighting, and bookmarking activities including new Troubleshooting Activities, new Follow-the-Heat• Animations, videos, and animations and digital versions of the lab workbook activities. • • Troubleshooting Activities. These 29 digital activities, presented in the framework of a technician performing a service call, put the learner “in the technician’s shoes.” Throughout an activity, the learner is presented with choices and questions regarding the logical next steps and the proper use of test equipment. The structure of the activity reinforces the general troubleshooting methodology presented throughout the book. • • Follow-the-Heat• Animations. This collection of more than 60 short animations introduces learners to foundational concepts such as the scientific principles at work in the refrigeration cycle the compression refrigeration cycle and its primary components and electrical theory and basic applications. The Follow- the-Heat• Animations engage learners using visual and auditory delivery, and the short-format animation allows for easy repeated viewing to deepen the understanding of concepts. The fifth edition of Heating and Cooling Essentials includes several updates to reflect changing regulatory requirements and advances in equipment and practices. In addition, animations and activities have been added to the digital product offering to make learning easier for today’s learners. The following detail some of the new additions for this fifth edition: xii