This book provides an expert account of the electric and electronic components used for modern air conditioning, heating, and refrigeration systems. Packed with hundreds of detailed illustrations, this in-depth reference fully explains circuits, diagrams, digital controls, safety procedures, troubleshooting, and more. This essential resource covers all electrical and electronic principles and applications of HVAC, including basic electricity, electric measuring instruments, control devices, heating circuits, refrigeration and freezer circuits, and other topics. This book is designed to build knowledge, skills, and confidence.