Dual fuel systems are becoming more popular in the United States as homeowners work to save money on their energy bills and reduce their carbon footprints without sacrificing their quality of life. For example, a homeowner’s furnace can run on a dual fuel system of a heat pump and a natural gas, like propane. That furnace determines how much it will cost to run your air conditioner or heater at full blast and for how long. You can go with a single-stage model or a two-stage model for your furnace. To decide whether you want a single-stage furnace or a two-stage furnace, learning the difference between a single stage vs two stage furnace will help guide your purchase.

How does a dual fuel system work?


A dual fuel system is a type of energy system that uses two different fuel sources. The two most common types of dual fuel systems for vehicles are gasoline-diesel and gasoline-natural ga, but as stated before, furnaces, whether a single-stage furnace or a two-stage furnace, can also run on a dual fuel system. And this makes powering your HVAC system the best of both worlds, reducing your carbon footprint and raising your quality of life without a high price tag.

These systems are more fuel-efficient, cost less money over the long run, and they produce full capacity power with less energy consumption. The propane fuel of your furnace unit determines the heat output during the colder months and the heat pump determines how cool your home can be during the summer.

You should also consider the size of your home when looking into a single-stage furnace or a two-stage furnace because even with the dual-fuel system switching between the power sources, you might have cold spots during the winter or overheated spaces during the summer. Always take time to research what the right furnace is for your home.

How does a single-stage furnace use the dual fuel system?

As we know, a dual fuel system combines a natural gas furnace with an electric heat pump. This fuels the furnace so it can heat the home during the colder months, while the heat pump is used during the warmer months. The two types of furnaces we’ve discussed in this article, the single-stage model and the two-stage model, use the dual fuel system differently.

A single-stage furnace’s dual fuel system switches between the gas furnace and the heat pump automatically, depending on the temperature outside. Because it works automatically, it is low power and costs less money. It’s a good option if you don’t want to pay the hefty price tag of a two-stage unit.

How does a two-stage furnace use the dual fuel system?

The main difference between the two types of furnaces is how much control you want over the temperature of your home.

A two-stage dual fuel system has two settings: high and low. The high setting uses the furnace to heat the home, while the low setting uses the heat pump. This type of furnace allows you to program your HVAC thermostat without worrying about temperature fluctuations throughout the day or week. Though it costs more than a single-stage, if you want more control over your air conditioner or heater, this may be the best option for you.

Dual fuel system furnaces are a great way to save money on your energy bills. They are more efficient than a gas furnace or an electric heat pump alone, and they can also help you to stay comfortable all year round.


As the world continues to change and prices of living continue to rise, finding options that keep the climate of our homes controlled with energy efficiency is becoming a more popular search result on the web. Dual-fuel systems make finding an efficient furnace, whether you want a single-stage model or a two-stage model, easier for homeowners.