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Last modified: 2021-10-15 | Approximate reading time 6 mins
In North America, our weather is fairly unpredictable. As a result, we need to be able to rely on our home's heating system to keep us warm during those notably cold months.
How many homeowners are curious about how these home heating systems actually work?
It would be worth your while to know what type of heating system you have in your home, as well as how it functions to keep friends and family toasty. Maybe you're considering a renovation project to go green-friendly, or your outdated furnace needs to be replaced. Whatever the case, we're here to offer some guidance regarding how your home heating system operates!
All central heating systems operate using a primary heating appliance, commonly a furnace or boiler. Generally, this unit is large and awkward, and thus, will reside somewhere out of sight such as the basement or garage of the home. Its main function is to deliver heat and dispense it throughout the house. This happens by pumping warm air through the house by way of a system of air ducts or sending hot water or steam through pipes to radiators or convectors.
With either system, thermostats control the heat and/or cooling unit, turning it off and on as room temperatures rise and fall. A typical forced air system will have a single thermostat. Some homes do not have a central heating system, and they will utilize electric heating or baseboards.
If you are a homeowner in North America, it is likely that your home’s heat is dependant on a central furnace. For contemporary homes, the most common type of centralized heating is a ducted air system; if you notice an air conditioner, heat pump or furnace, then your home has a ducted air system. There are 2 main types of ducted air systems: forced-air and gravity, and either of these can be powered by electricity, natural gas or fuel oil.
Forced air systems operate with a furnace that warms the air and an air conditioner that cools the air, as well as a heat pump that warms or cools the air. A blower works by forcing the heat or cooled air through a system into areas of the home.
If your heating system includes an air conditioner or heat pump, it is a forced-air system. In contrast to a forced-air system, a gravity furnace uses naturally occurring convection currents to carry heated air through the system from a furnace that is located below the main floor. Unlike forced air systems, gravity systems cannot deliver cooled air and tend to have very large air ducts and no blowers.
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A central gas heating system creates a cycle, increasing the temperature of cooler air to heat it up. Inside the furnace, burning propane or a natural gas generates heat in the burner, this fuel is then mixed with air and burned.
The flames created heat up a metal exchanger and air from the home is blown over this exchanger, causing it to warm. Then, the furnace's blower forces this heated air into the supply ductwork, and it is distributed throughout the home.
Combustion products are vented out of the building through a flue pipe. More recently, minimum-efficiency furnaces reduce waste by using an inducer fan to pull the exhaust gases through a heat exchanger, inducing a draft in the chimney.
source: Pixabay, akiragiulia
While furnaces carry heat by way of warm air, boiler systems distribute the heat by way of hot water. A boiler uses a pump to circulate hot water through pipes to radiators, the hot water passes through radiators or other heating devices. Then, cooler water returns to the boiler to be reheated. Generally, at-home boilers use natural gas or heating oil as fuel.
Although uncommon in contemporary households, steam boilers boil water and the steam carries heat throughout the house, condensing water in radiators as it cools. Certain boiler hot water systems circulate water through tubing in the floor, a system also known as radiant floor heating. As with furnaces, condensing gas-fired boilers are common and more efficient than non-condensing boilers.
source: Pixabay, Tama66
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