Newly expanded and updated to meet the needs of todays technicians, this book offers comprehensive, in-depth coverage of modern heating theory, systems, and service. This book is the perfect on-site resource, providing easily accessible information on all major types of heating systems. A clear, conversational writing style is used to allow readers to quickly and easily grasp important concepts, and develop the terminology needed to interact with others in the industry, from sales people to fellow technicians. Updates to this 2nd edition include expanded coverage of basic electricity and new units on electric motors and blueprint reading. Through, real-world examples, step by step explanations, and detailed case studies make this book an indispensable resource that belongs in every technicians toolkit.