This course is about the principles and theory of heating and the procedures required for installing, operating, maintaining, troubleshooting, and repairing warm-air heating and hot-water heating systems and associated peripheral equipment.

Heat is one of the prime necessities of life. It is as essential as food, clothing, and shelter. You can have a very good shelter, but you still need heat to be comfortable in it. By studying this chapter, you will start to gain knowledge of what you will be required to know to become efficient in the HVAC/R field.