Heating and Cooling E S S E N T I A L S F I F T H E D I T I O N Publisher The Goodheart-Willcox Company, Inc. Tinley Park, IL www.g-w.com Jerry Killinger Don Crawshaw Certified Master HVAC Educator (CMHE) HVAC Program Coordinator Salt Lake Community College Salt Lake City, Utah Illustrations by LaDonna Killinger