Does A Gas Furnace Use Electricity? 9 Facts You Should Know


Do gas furnaces use electricity? Yes! They need electrical power to run the fan motor and ignition system. This is only around 600 watts per hour. Modern furnaces come with overload protection and a circuit breaker to stay safe during power outages.

Also, gas furnaces can still work during power outages if you use a generator or other sources of heat, like wood stoves or individual heaters. But, remember to consult with a technician first!

Moreover, when remodeling your home, don’t forget to consider the electrical power supply your gas furnace needs. Townsend Energy in the Denver area suggests having enough capacity for the furnace’s needs when designing new bathroom and kitchen areas.

So, why light a candle when you can just turn on your gas furnace during a power outage? It’s like having your own generator that keeps you warm and cozy.

Does A Gas Furnace Use Electricity

Image of Gas Furnace in a Home

Basics Of Gas Furnaces

To understand how a gas furnace works, let me explain the basics of gas furnaces and the various components present in them

There are two types of ignition systems: pilot light vs electronic ignition systems. In addition, gas furnaces come with several electrical components that have their own power needs. 

Lastly, gas furnace capacity and electrical power needs have to be understood in order to provide true heating. In this article, we will provide you with all the information related to gas furnaces to help you navigate any issues and service needs.

How Gas Furnaces Work

Gas furnaces use combustion to create heat. This is then distributed via ducts. When the thermostat registers the pre-set temperature, burners ignite and gas is lit with an ignitor

Hot combustion gases flow through a heat exchanger, releasing heat to warm air. This air is then spread throughout the house via the ductwork.

Gas furnaces can be highly efficient, yet maintenance and checkups are required for them to work properly. Features like programmable thermostats and zoning systems can increase their performance.

Gas furnaces are reliable and great at providing heat in cold weather. Modern gas furnaces have new technology and more efficient ratings, making them a favored option for homeowners. So, why bother with matches when you can have a pilot light or electronic ignition system for your gas furnace?

Pilot Light vs Electronic Ignition Systems

Gas furnaces use either a pilot light or an electronic ignition system to start the heating process. 

Pilot lights are small flames that are always on, while electronic ignition uses a spark.

Let’s compare the two:

Pilot LightElectronic Ignition
EfficiencyLess EfficientMore Efficient
CostCheaper initial costModerate to expensive upfront cost
SafetyRequires monitoringFewer risks of gas leaks

Pilot lights are cheaper, but less efficient. Electronic ignitions have moderate-to-expensive upfront costs, yet they provide more safety. Plus, they have fewer risks of malfunctions.

Furnace efficiency ratings vary, yet electronic ignition systems perform better on average. A study by Energy Star showed that an efficient gas furnace saves about $94 per year, for every percent increase in its AFUE rating.

So why risk electrocution when you can just stick with good old-fashioned combustion?

Image of a furnace with pilot light

Electrical Components in Gas Furnaces

Electric components are key for the safe and efficient functioning of gas furnaces. They guarantee the ignition, control, and regulation of the heating process.

The following table highlights some essential electric components regularly used in gas furnaces:

Gas ValvesRegulates fuel gas flowing into the furnace
Ignition ControlProvides spark to ignite the gas/air mixture
Flame SensorMonitors flame quality and offers safety shut off
ThermostatMonitors room temp to signal furnace on/off 
Blower MotorMoves heated air throughout the space

It is possible that your gas furnace may have extra electric components depending on its model or maker.

Ensuring these components are regularly maintained and inspected is critical to avoid electrical faults that can cause fire risks. Make sure you hire certified professionals for installation, inspection, and repair.

Statistics show that faulty units cause dozens of deaths every year due to carbon monoxide poisoning from damaged exhaust systems.

If gas furnaces had superpowers, it would be to warm your home without draining your wallet or blowing fuses.

Gas Furnace Capacity and Electrical Power Needs

Gas furnaces are essential for many heating systems. 

Different capacity levels and electrical power needs exist. It’s key to understand these before selecting the right unit.

Here’s a table showing the common gas furnace sizes and their heating capacities plus electrical power needs:

Gas Furnace CapacityHeating Capacity (BTU/hr)VoltageAmperage
Small Gas Furnace60,000-80,000120V15-20A
Medium Gas Furnace90,000-120,000240V20A
Large Gas Furnace150,000-200,000240V30A

Values may vary based on altitude and fuel type. Pick the one that matches your home’s needs for optimal performance & energy efficiency.

Don’t take the risk of facing harsh winters without a reliable gas furnace. Consult with HVAC specialist and get the right equipment. Avoid unpleasant surprises when cold weather comes. Using a gas furnace for electricity savings doesn’t make sense!

Electricity Usage in Gas Furnaces

To understand the electricity usage of gas furnaces the sub-sections, “Electricity Needs for Heating,” “Electricity Needs for Blower Fan,” and “Minimum Overload Protection for Electrical Components,” is the solution. 

Gas furnaces require electricity to start and have electronic ignition systems. The furnace’s blower fan also needs electricity to circulate air throughout your home

Electrical components such as ignition, thermostats, and blower motors have minimum overload protection. These details can help homeowners plan for power outages, remodeling, and other issues related to heating.

Electricity Needs for Heating

Gas furnaces use electricity even though natural gas is their main source of heat. The electricity powers the blower motor that circulates air throughout the house. It also operates the pilot light and ignites the burners in newer models.

Electricity usage of gas furnaces can vary. Factors such as filter cleanliness, age of the system, and environmental temperature changes affect it. The energy consumed is low compared to electric or heat pumps. Still, it impacts household bills.

Proper maintenance helps decrease electricity needs. Clean filters reduce resistance. Malfunctioning parts increase electricity usage, so they should be fixed.

A colleague recently found her monthly energy bill was higher than expected. An old gas furnace was the cause. She replaced it with a new, energy-efficient model and bills were reduced over time. Electric blower fans won’t blow your electricity bill away.

Electricity Needs for Blower Fan

Gas furnaces need electricity to run their blower fan. This depends on the size and type of furnace. The fan distributes warm air throughout the house, making it an essential part of the furnace.

Newer models are more energy-efficient and require less electricity than older models. Some feature variable speed fans, which use less electricity for even greater efficiency. Plus, homeowners can add a high-efficiency filter. This cleans air and reduces electricity needed for the fan.

It’s energy-efficient to run the furnace fan continuously. This circulates air, reducing run time for other HVAC components, saving energy and cutting wear and tear.

One homeowner found that running their fan continually helped distribute heat better and improved air quality while decreasing dust. With the high-efficiency filter, they saw a decrease in their energy bill with no loss of comfort.

Minimum Overload Protection for Electrical Components

To keep electrical components safe from overload, a minimum safeguard is a must. This is key for the furnace system to work properly. 

The table below displays the necessary components and their protection requirements.

Motors 120V3-5 Amps.
Motors 240V2-4 Amps.
Fan Blower Motors 120V/240V7-10 Amps.

Ignoring these safeguards can cause serious damage to components or even cause a house fire. To make sure your home and family are safe, it is recommended to have a licensed professional inspect the furnace every so often.

Recently, someone cut corners when it came to overload protection in order to save money. Sadly, this caused damage to the furnace and lots of money had to be spent on repairs. Don’t risk the safety of your home.

Power Outages and Gas Furnaces

To keep your home warm during power outages with a gas furnace, power outages and electronic ignition systems, gas furnaces and power generators, and using a gas furnace during power outages are three essential solutions that you must consider. 

In case of a power outage, there is no need to worry about freezing temperatures. By understanding these three sub-sections, you can keep your home warm and safe during the winter season.

Power Outages and Electronic Ignition Systems

Power outages can impact electronic ignition systems in gas furnaces, making heating homes difficult. There are two main types, spark-ignited and hot-surface ignited. 

Spark-ignited requires electricity, whereas hot-surface ignited may take time to reset.

It’s important to plan for cold weather power outages, as gas furnaces are at risk. A generator or fuel-burning space heater can provide heat as a backup and proper insulation can reduce energy costs and make your home more energy-efficient.

Gas Furnaces and Power Generators

It’s important to remember gasoline and diesel inverters won’t work with gas furnaces. They make impure electricity, which can damage or break the furnace. It’s best to get a portable or standby gas backup generator.

Plus, conserving power can keep the furnace running longer. Cut back on opening doors or windows, don’t use unnecessary appliances, stop drafts, and add insulation to walls and attics. All these things will help your furnace last and use less energy when there’s a power outage.

When the lights go out, at least there’s the gas furnace. We can stay warm in the darkness.

Using Gas Furnace During Power Outages

If the furnace needs electricity, like an ignitor or blower motor, it won’t work if there’s no power. So, use an alternate heat source like a propane heater or generator. Keep in mind that proper ventilation is required.

Gas furnaces need regular maintenance and inspections by a professional. Invest in generators or battery-powered carbon monoxide detectors for extra safety. Always get help from a licensed professional for any repairs or installations involving the furnace. Safety is key when dealing with gas leaks and carbon monoxide.

 When it’s cold, just remember that a gas furnace can warm your heart…and maybe your house, too!

Safety Concerns

To ensure your safety when dealing with gas furnaces, I address some concerns you may have regarding the potential hazards of this heating system

In this section titled “Safety Concerns”, I highlight the importance of taking safety precautions when dealing with gas furnaces. I also discuss the electrical safety considerations that need to be kept in mind while using gas furnaces. Both sub-sections are valuable resources for homeowners to educate themselves about the safety aspects related to gas furnaces.

Safety Precautions When Dealing with Gas Furnaces

Safety is the top priority when dealing with gas furnaces. Wear PPE, such as gloves and safety goggles, and be mindful of electricity to avoid fires

Regular inspections are a must. Check the flue vent and parts like heat exchangers for blockages or damage. Carbon monoxide detectors should be installed in these areas, too.

The National Fire Protection Association reports that in 2018, there were 7,930 home structure fires in the US related to heating equipment, causing 70 civilian deaths and $1.2 billion in property damage.

So, it’s essential to observe safety precautions while repairing or maintaining gas furnace. no matter your experience level, to prevent fatalities or costly accidents. Sparks are flying, but not from the wires.

Electrical Safety Considerations When Using Gas Furnaces

Operating a gas furnace requires electrical safety. Make sure it’s installed by a pro. Inspections and maintenance are musts for an efficient system. Avoid overloaded circuits, and don’t use damaged wires or cords.

Carbon monoxide poisoning is a major risk. Install a detector to prevent accidents.

A cautionary tale, a man was injured while repairing his own furnace. Don’t be that guy. Get a licensed technician to assist with any issues.

Maintenance and Services for Gas Furnaces

To ensure your gas furnace is running efficiently and safely, regular maintenance and services are necessary. Gas furnace maintenance, services, and the importance of hiring professional technicians are essential solutions to address potential issues. 

Without regular upkeep, your gas furnace may face problems like power outages or overload protection. In this article, we will explore the benefits of gas furnace maintenance, the services offered by professional technicians, and why hiring experts for gas furnace services is crucial for your home and family’s safety.

Gas Furnace Maintenance

Gas Furnace Upkeep, it is the time for service. Maintaining your gas furnace is key for wintertime warmth. 

Here’s a 5-step guide to help you easily keep it up:

  1. Inspect the Air Filters
  2. Clean the Burner and Blower Motor
  3. Check Flue and Chimney for Blockages
  4. Examine Thermostat Settings
  5. Hire a Pro Annually to Evaluate Performance

Also, check the fan belt tension, electrical connections, and other related parts for top performance.

Pro Tip: Clean your gas furnace before using each season & mid-season. Get regular servicing, or you could have a hot mess!

Gas Furnace Services

As a homeowner, it’s essential to keep your gas furnace running smoothly all year round. Regular maintenance and services can help prevent costly breakdowns and improve efficiency. 

Here are some important points on these services:

  • Inspect and clean the burner and heat exchanger.
  • Replace air filters to ensure proper airflow.
  • Check and adjust the fan belt tension.
  • Lubricate moving parts for optimal performance.
  • Check thermostat calibration and function.

Some tasks can be done by the homeowner, but others should only be handled by a licensed professional. Regular servicing extends the life of your furnace and keeps your home safe from potential carbon monoxide leaks.

Having a maintenance plan in place can save you money in the long run. Don’t wait until your furnace breaks down, schedule regular Gas Furnace Services today. Hire a professional and enjoy a warm sense of security (and warmth).

Importance of Hiring Professional Technicians

Professionals are key for keeping gas furnaces in top shape. They have the knowledge and know-how to spot, diagnose and repair any problems. Hiring them ensures your furnace is running safe and economic, saving energy and avoiding risks.

They have the latest tech and kit to give accurate maintenance. And they can tailor their services to your needs, ensuring your furnace is in prime condition.

Doing DIY repairs or using unqualified technicians can make things worse. It can cause costly damage or be dangerous.

For your comfort and safety, it’s essential to use qualified technicians for furnace maintenance. Don’t miss out on the benefits of a fully functioning heating system and get the right people in today.


Gas furnaces are a great source of heat in homes. But, they require electricity to power certain components. The fan motor and electronic ignition system need electricity to work. If there’s a power outage, gas furnaces may still work without the blower motor. Yet, some areas have minimum overload protection capacities for their power supplies. This could cause issues during a power outage. If this happens, wood stoves or heaters that don’t use electricity could be used instead. Despite using electricity, gas furnaces consume less power than other appliances in your home. It’s important to have a technician service your furnace regularly. This ensures it runs safely and works efficiently. Having Mosby designers do any remodeling related to your furnace will ensure safety regulations are followed. During winter or times of potential power outages, it’s wise to have generators ready as a backup for essential appliances.