If you are experiencing any cold draft in your home then there is a problem with your home furnace. Whether you are planning to get your existing home furnace repaired or intend to buy a new system, you must be aware of what a home furnace is, its functions and the mechanisms so that you can be a judge of what may have gone wrong with your heating system. This knowhow would also help you to buy the right kind of heating system for your home.
A home furnace is a heating system that heats the interior air through a heating medium which is normally referred to as an intermediary fluid movement. The heating medium can be air, steam or hot water. The home furnace needs a fuel source if it is a combustion furnace. The fuel source is most commonly natural gas but propane, fuel oil, wood or coal is also used. Electricity is also used by many types of home furnaces across the country. Combustion furnaces require a vent to let out the heat and this is done by a flue.
There are many other types of furnaces including central warm air furnace, forced air furnace and gravity furnace.
A central warm air furnace is a type of combustion furnace but functions as a central air conditioner would. A central combustor heats the air and circulates it through ducts to different rooms and areas of the home.
A forced air furnace uses force to circulate the air through ducts. This is more commonly used in commercial areas and industries.
A gravity furnace functions a little differently. It has a circulation system based on the concept that warm air rises up while cold air settles down. Having the combustion systems at the bottom allows the cold air settling down to be heated and then it rises up. This circulation cycle naturally allows for a flow of heated air through the system.Any furnace typically is made of three primary components.
The integral device is the burner that includes a heat exchanger, draft inducer and vents. The burner heats up the air and the heated up air in turn heats up the metal walls thus dissipating heat. This eventually heats the air which is then circulated by the blower, ducts and the exhaust gases are let out by the vents.
The blower is the second component that regulates the movement of the heated air. It is tasked with circulating the heated air through the ducts and the vents.
Any furnace would have a series of controls and safety devices including a gas valve, ignition control, flame sensor, transformer, blower control, flame roll out switch and others.