How Does A Furnace Work?
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How Does a Furnace Work?

With the start of autumn and the holiday season around the corner, let’s take a look at the components of a furnace and how they work so that you can ensure that your system is working efficiently. A furnace can help keep your home or business comfortable when the weather changes and the temperatures drop and are an essential component of the heating, ventilation, and air conditioning (HVAC) system. Your furnace starts when you adjust the temperature on your thermostat. Once you select the temperature, the furnace turns on, starts the fan, heats the air, and moves the air throughout your home.

Major Parts of a Furnace

It’s not essential to understand every aspect of a furnace. However, understanding the major components can help you determine when there is a potential issue to resolve. Below, we break down some of the significant parts of a furnace and simplify how a furnace works to heat a space.

Blower Motor

The blower motor is the part of the furnace that pushes warm air throughout your house through the ductwork. But importantly, this blower also circulates air on the cooling side, so it works all year long.  Regular maintenance is important for the blower motor.

Heat Exchanger

The heat exchanger is a series of metal tubes that absorb heat from the combustion chamber. The air then moves across the pipes, taking the heat into the house.

Combustion Chamber

This is where natural gas or propane is burned, creating the heat that keeps your house warm. The combustion chamber is an essential part of the furnace that needs regular cleaning during maintenance.


The filter cleans the air returning to the furnace after being circulated throughout your home. It is responsible for keeping dirt, dust, and other dangerous particles out of your furnace. The filter is essential for cooling as well.

How Does a Furnace Work?

Now that we have a layout of some of the major systems in a furnace, we’ll break down how it works to keep your home warm and comfortable during the cooler months.  A furnace creates a cycle of air that warms up your home:

  • First, heat generates in the furnace’s combustion chamber when you adjust the temperature on your thermostat.
  • Next, the heat from the burning natural gas or propane passes through the heat exchanger tubes, making them hot.
  • The blower motor pushes air through the heat exchanger, warming the air and sending it through the ductwork into your home.

Contact the HVAC specialists at Vredevoogd

The Vredevoogd crew is committed to providing our customers with effective and longstanding solutions for their HVAC systems. From tune-ups to repairs, replacements, and installation, you can rely on the Vredevoogd HVAC specialists to provide top-rated service. Contact our expert team to learn more about our HVAC services!

Call Vredevoogd Heating & Cooling for all your plumbing, heating, & cooling needs. In the greater West Michigan, Lakeshore, and surrounding areas call: 844-HVAC-365

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