Have you ever taken some time to think about how your furnace works?
The furnace is a machine that that is used by many people, most noticeably during the winter months. However, how many people actually understand how it works? Very few. If you’ve ever lived in a cold house as a result of faulty heating system you will have a different perspective about the home furnace. Spending a cold night in a house with faulty heating system is like being left alone on a dark and lonely road when your car becomes stuck.
In this post, we will take a look at the following:
The component of the furnace.
How the furnace works.
The importance of understanding your furnace.
Components of The Furnace
The furnace comprises three major components which include:
The heat exchanger
Let’s take a look at each of these components one by one.
This is the central component of the furnace. It is the compartment where air mixes with fuel to burn with the desired efficiency. We can have a gas furnace or oil furnace. The fuel used in a gas furnace is gas while that utilized in an oil furnace is oil. This implies that a gas furnace burns gas and air while the oil furnace burns oil and air.
The air carries the oxygen gas which enables burning. If you use an electric furnace, the heat is generated in a different manner. Electricity is transferred into elements having high resistance and these elements get hot due to their reaction with the electricity.
The Heat Exchanger
Another name for this is the boiler. It comprises a set of coiled pipes which carry water through heated flames. The length of the pipes is dictated by the surface area. The surface area of the pipe allows heat to be absorbed by the water.
In the case of an electric furnace, the element is sealed in a tube which is found in a water tank. In order to create a higher surface area for heat absorption, the element is usually doubled.
The pump is the component of the furnace that keeps the water circulating in order to spread the heat and also prevents increases in pressure. The pump works in ensuring adequate heat transfer because convection cannot come into play in a closed environment.
How The Furnace Works
Now that you have an understanding of the components that make up a furnace, let’s look at how it works.
Most modern furnaces use a fan to create a draft instead of heat to be produced by flame from the burner. The igniter then creates a high-voltage spark and this ignites the gas in the burner. The gas valve contains an electromagnet which opens to give room for the flow of gas after the spark. This however happens after the thermostat and other controls have been energized.
The air and fuel then mix in the burner at the appropriate proportion in order to burn at the maximum efficiency possible. The heat exchanger then gets heated with gas flame and air is passed over it. The air (which has become heated) then becomes distributed to the house.
The furnace blower (fan) generates pressure and this pulls in cool air in order to heat it. The warm air is then pushed out into the house. Cooled air also returns to be heated through a ductwork. Inadequate return air ducts can make the system pressurize the house by driving air through all openings leading to energy wastage.
The furnace filter installed into the furnace removes dust, smoke or allergens from air that’s returning to the furnace.
Why Do You Need to Understand Your furnace?
The explanations above are the basic means through which a home furnace works. Having this knowledge will enable you to understand how it works and to ensure you and your family are as safe as possible as your home is heated.
It is therefore essential to create a yearly maintenance schedule for your furnace in order to avoid trouble.
Do you have any issues (minor or major) with your furnace? Let us know in the comment box below.
Call Loveland HVAC Repair today!