How does a boiler differ from a furnace?
The basic heating principle is the same. The difference is that a furnace heats air and a boiler heats water. With a boiler, a circulator pumps the hot water through a system of pipes, distributing the water to radiators, baseboards or air handlers throughout the home. Some boilers are designed to create steam, which circulates by means of a system of pipes. The pipes are connected to steam radiators throughout the home.
