For one/two-semester, beginning/intermediate-level courses in Forced Air Heating (using gas, fuel oil, electricity, and heat pump fuel sources). This text offers a complete guide to the installation, maintenance, and service of gas, oil, and electric forced warm air heating and heat pump systems. It explores in great detail a large base of newer as well as traditional equipment, using the principles and practices of older furnaces as a means of understanding the newer, electronically controlled, high-efficiency furnaces. It explores, in detail, the operation and diagnosis of controls from the thermocouple to the SmartValve and provides a complete overview of all aspects of residential and light commercial heating.