Introducing a completely current and innovative way to teach the basics of HVAC-R! Featuring more than 125 practical competencies, this "how to" guide has been carefully designed and thoroughly modernized to provide a complete learning system for the fundamentals and applications of core HVAC-R concepts. It combines straightforward theory lessons with useful "hands-on" opportunities for learning about the industry's hottest topics, including electricity and electrical controls, refrigeration fundamentals, heat pumps, oil and gas heat, safety, and more. Enhancements to this edition include an updated tool identification chart, new and improved graphics, expanded information on calculator usage, and a pressure temperature chart for use by technicians in the field.