What are Boilers?
Boilers are systems designed for heating air or water to produce heat or energy. They can be incredibly simple or fairly elaborate. Basic boilers are made up of an enclosed container where heat is applied to water, which is then circulated throughout the system in the form of hot water or steam. Water must be boiled, thus the term boiler, to create steam.
However, many home heating systems and water heaters that utilize boilers, don’t actually boil the water. Rather than being boiled to produce steam, water is generally heated to temperatures somewhere roughly between 140 and 200 degrees Fahrenheit (or 42.14 - 93.3 degrees Celsius), although some people lower the settings to save energy and money.
Much like a typical furnace heats air, boilers heat water or other heating fluids. The heated liquid then passes through pipes rather than ductwork to a particular heating implement, such as a radiator to disburse heat. With radiant heating systems, sometimes referred to as heated floors, pipes can be placed in the floor or ceiling. The water is heated in boilers then moved through the pipes. The pipes distribute heat throughout the space instead of at the end of a line via some other form of heating implement.
As you may know, the air used by a furnace is re-circulated, being warmed and cooled again and again. The same is true of the water or fluid used in boilers, although the methods and equipment used to heat the materials are different. Furnaces rely on fans while boilers rely on pumps. Boilers must be connected to the plumbing system in a home or commercial property so that water can be provided to the heating system. Newer boilers may also include a safety feature that shuts them down if the water level is too low.
Some other features of boilers include pressure control valves to keep the pressure from building up too much as water is being heated. Many also have a larger tank that is used to hold the water as it expands during heating. While boilers may be simple and effective to use, they must also be used safely, and many modern designs are equipped with numerous safety features.
Boilers also have the added benefit of not requiring air filters. Cleaning and replacing air filters is not required with a boiler system. Boilers do typically have features to keep the water within the system from returning to the water source.
Written by Sherry Holetzky
