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How Does a Furnace Work

Heating systems warm our homes and provide comfort when the weather turns cold. They come in a variety of forms, but they all operate using the same basic concept. Heating systems transfer heat from a place that’s hotter than the current temperature (such as a furnace room or boiler) to a place that’s colder (such as your home). This is typically accomplished through the use of piping, ductwork, and heat exchange systems. Here is what you should know about how furnaces work.

What Is A Furnace and How Does It Work?

When the temperature drops, you know it. Your furnace slows down, coughs, and wheezes more than usual. In order to keep your home warm, you should change the setting of your furnace. As long as the temperature is low, you should keep the heat on. When the temperature dips, you lower the heat so your furnace can stay in good working order.

The furnace works to maintain the temperature in your home. This can be done in a few different ways. For example, your furnace can radiate heat using air ducts. A heat exchanger can work to transfer heat from a hot source to a cool one. Some furnaces also have an automatic thermostat that changes the settings to keep your home at the right temperature.

A furnace has three main components: the blower, the furnace, and the heat exchanger. The blower fan blows air through the furnace and heat exchanger. The blower is connected to the furnace and the heat exchanger.

What is a furnace blower belt?

The blower motor that moves the air throughout your furnace and air conditioning system is an important part of your HVAC system. It is typically referred to as the blower fan, blower motor, or blower belt. This component is responsible for circulating the air in your home, and it will begin to make unusual noises or not work at all if it not functioning correctly. The belt may also stretch or break if it is no longer being used.

Blower motors are fan belt-like components that send the heat or air throughout your HVAC system. The belt should be replaced periodically, usually on an annual basis, to keep your system running at peak efficiency. Signs that the blower motor is ready to be replaced include loud grinding noises and shaking when your AC or furnace is turned on. The blower motor is a small component located in the furnace or air handler.

The furnace is the big metal box in your home. The blower fan is connected to the furnace, and the ductwork is connected to the furnace. The furnace sits in the ductwork. Your home will be slightly warmer if the furnace is in a room that is 80 degrees but slightly colder if the furnace is in a room that is 60 degrees. When you turn the thermostat up or down, the furnace automatically adjusts.

What is a heat exchanger?

A heat exchanger is a pipe that works like a smaller version of a radiator. The hot air from one room goes into the exchanger, and the cold air from outside comes out. The exchanger is connected to the furnace and the cooling source like a fridge. Some heat exchangers also have a fan that blows on the inside of the exchanger. This helps reduce the temperature on the inside of the exchangers.

How does a furnace work?

Your furnace can have many options. A programmable thermostat is a common feature. This lets you change the settings to help you stay comfortable. A furnace can also be set to heat only in the morning and cool down your home only at night.

Types of Furnaces

Forced air – These furnaces use a blower and ductwork to push air through your home. They all have ductwork that goes from the furnace to the outdoors.


This is a common type of furnace. They use gas as a source of heat.


These furnaces use oil as a heat source. They also have filters to collect dust.


Electric furnaces use electricity as a heat source. They also have a thermostat that lets you change the settings.

How do heaters work?

A heater uses direct air to heat up the air. Heaters are not connected to the heat exchanger. While they make your indoor air warm up, they don’t use the air that goes through the heat exchanger. The only time a heater should be used is when the furnace is off.

How do furnaces work together?

The thermostat on your furnace sets the temperature. The furnace is essentially a big metal box. It uses the heat from the furnace to make the heat exchanger work. The heat exchanger transfers heat from the heat source to your home. The thermostat then sends the heat down to the furnace and up to the heat exchanger.

Wrapping Up

Your furnace keeps your home warm. It uses air from the ductwork and sends it through the heat exchanger. Through this, it transfers heat from a hot source to a cool one. A furnace also has many other features like a thermostat that lets you change the settings and a blower to blow air.

The furnace will be slightly warmer in rooms that are 80 degrees but slightly colder if the furnace is in a room that is 60 degrees. Overall, the furnace is a great way to keep your home warm in the winter. The more you know about furnaces, the more confident you will be when buying parts for a furnace or even buying a whole new furnace for your home or business.

Find the Parts You Need for a New Gas Furnace at Telco

Now that you know more about blower motors and gas furnaces, it is time to shop for the parts you’ll need for a new gas furnace. Telco has all of the parts you need for blower motors and gas furnaces. Better yet, we offer exceptionally friendly service. Our team of representatives will be happy to assist you or answer any questions you might have.

Need blower motors or parts for a gas furnace? Find it all at Telco today!