Do Gas Furnaces Use a Lot of Electricity?

Did you know that gas furnaces, while fueled by natural gas, use electricity for several key functions? You might be wondering, "Do gas furnaces use a lot of electricity?" Let's dive into the energy consumption of gas furnaces to understand how they operate and how much electricity they use.

In this article, we'll explore the role of electricity in gas furnace operation, discuss how much electricity they consume, and highlight some energy-saving tips. By the end, you'll have a clear understanding of the electricity usage of gas furnaces and how to manage their energy consumption.

Electricity in Gas Furnace Operation

Gas furnaces primarily rely on natural gas for heating. However, they require electricity to power multiple components that enable their operation:

Ignition System

Modern gas furnaces use an electronic ignition system instead of a continually burning pilot light. The ignition system, powered by electricity, generates a spark to initiate the combustion process when the thermostat calls for heat.

Spark ignition systems use a small amount of electricity, around 0.005 kWh per heating cycle. This is significantly less than the electricity consumed by a continually burning pilot light in older furnaces (around 0.033 kWh per day).

Blower Fan

The blower fan in a gas furnace helps circulate warm air throughout your home. The fan operates on electricity and consumes more power than the ignition system, accounting for approximately 80% of a furnace's total electricity usage.

The exact electricity consumption of a blower fan varies depending on its size, efficiency, and how frequently it runs. On average, a furnace's blower fan might consume around 0.07 kWh per hour of operation.

Gas Furnace Electricity Consumption

Now that we understand the roles of electricity in gas furnace operation let's delve into the electricity consumption of an average gas furnace:

Annual Electricity Consumption

The annual electricity consumption of a gas furnace primarily depends on its size, energy efficiency, and how much you use your heating system. The U.S. Department of Energy estimates that gas furnaces consume around 0.05 to 0.13 kWh of electricity per hour of operation. Assuming an average blower fan electricity consumption of 0.07 kWh per hour and heating 2,000 hours in a cold climate, the annual electricity usage would be approximately 140 kWh.

To put that into perspective, 140 kWh represents about 1.5% of the average U.S. household's total annual energy consumption (around 9,000 kWh). So while gas furnaces do consume electricity, the amount is relatively small compared to their overall energy usage.

Electric Cost for Gas Furnaces

The electric cost of running a gas furnace varies depending on your local electricity rates. Using the annual electricity consumption estimate of 140 kWh and an average U.S. electricity rate of $0.12 per kWh, the annual electric cost for a gas furnace would be around $16.80.

Although gas furnaces require electricity for operation, their electric cost is minimal compared to the energy saved by using natural gas for heating. Natural gas is generally less expensive than electricity for home heating, making gas furnaces an energy-efficient and cost-effective heating option.

Energy-Saving Tips for Gas Furnaces

To further minimize the electricity consumption and reduce the overall operating cost of your gas furnace, consider the following energy-saving tips:

Choose an Energy-Efficient Model

When replacing or installing a new gas furnace, opt for an Energy Star-rated model with high Annual Fuel Utilization Efficiency (AFUE) and an energy-efficient motor for the blower fan.

Energy-efficient gas furnaces can help reduce electricity consumption and lower your heating bills.

Maintain Regular Furnace Maintenance

Regular professional maintenance is essential for keeping your gas furnace in peak operating condition. During maintenance, a technician will clean the furnace, inspect its components, and make any necessary repairs.

Regular maintenance ensures that your furnace operates efficiently, reducing electricity consumption and preventing costly breakdowns.

In most homes, gas furnaces consume a relatively small amount of electricity. While it's essential to be mindful of their electricity usage, the primary fuel savings and overall energy efficiency of gas furnaces make them an excellent choice for home heating. By understanding how they operate and implementing energy-saving tips, you can minimize their electricity consumption and maximize your heating efficiency.