Top 5 Best Generators For a Furnace

The natural gas furnace enables you to keep your family warm and ensure that everyone is comfortable at home during the winter.

In places prone to power outages, a simple blackout can cause your boiler to stop working until power is restored, which can take hours or days. To prevent delay, you can use the right size of a generator for a furnace.

Portable generators are the perfect solution to run most gas heat furnaces in the event of a simple power outage or natural disaster. They are easy to use, lightweight, and provide plenty of power. However, when it comes to choosing what portable generator to run your furnace, there are many factors to consider.

Below we made mention of the best portable generator size to run a furnace in 2021 and beyond.

Without Further ado;

Best Generators For a Furnace – Our Top Picks

Honda EU3000iS

EU3000iS is one of those generators from Honda equipped with advanced technology and can work very quietly and efficiently. You can use it not only for home and camping but also for running your air conditioner.

If you have a full gas tank, it can run straight for 7.2-20 hours, but it certainly depends on the load. If you want to use it with your motorhome, it can also be an efficient unit that you can carry with you. This is our top option for a furnace generator.

Features

  • Emergency source of power for motorhomes with additional backup for ACs up to 13500 BTU
  • Generates a noise level of up to 58 dBa, which is entirely negligible
  • It has a recoil start option.
  • With 3.4 gallons of fuel, it can run for a maximum of 20 hours.
  • The great eco-throttle feature improves fuel efficiency.
  • Advanced inverter technology ensures that all your devices are powered reliably and securely to protect them from damage.
  • It can be connected to another one of these generators in parallel to get more power up to a maximum of 6000 watts.
  • Supplied with a 12 V DC socket
  • A low oil level indicator ensures that the engine is switched off when the oil level is low.
  • Additional protection for your household appliances in the event of an overload

Pros

  • Portable
  • Compact design
  • Easy to lift and install
  • The finest noise reduction
  • It comes with an ignition system, throttle valve, and fuel valve.

Cons

  • Pretty expensive in its class
  • The duration is not that long

Champion 4,000-Watt Generator

The Champion 4000 Watt Inverter Generator is highly portable, so even if you move from one city to another, it’s not a problem to carry it around with you to your new home. In addition, it’s equipped with a kick start device and a wireless connection.

You can conveniently operate it remotely from your mobile phone, but you must be within 80 feet of the generator. This generator can easily run for 12 hours with no problem if you have fuel at total capacity in the tank.

It’s also supplied with a steel frame that allows the generator to operate in quiet mode. Unlike many other generators, this generator can only produce a noise level of 68 dBa, which is negligible if you are in a dense residential building.

Apart from gas heat furnaces, you can efficiently operate a sump pump, televisions, and power tools while you’re experiencing a simple power outage in your area. Apart from an additional RV connection, it has two sockets with 120V each. It also has a monitor that informs you about the voltage, operating hours, hertz, and heating. The oil shortage sensor shows you when to fill the tank or stop the appliance. This Champion model is another good choice as a furnace generator. 

Features

  • With a 196cc engine and battery, you can start your machine easily.
  • It’s supplied with an ignition switch equipped with Cold Start Technology so that the machine remains in operation even in the cold season.
  • If you’re within 80 feet of the generator, you can easily control the stop and start button from your smartphone using the built-in mobile connection available with the generator.
  • It has a maximum start power of 4000 watts and a running capacity of 3500 watts, which is enough to power your home for at least 12 hours if you add the fact that it doesn’t make any noise above 68 dBa.
  • Four outlets are available. 2 sockets with 120V, 30A power source, and two sockets with 120V 20A power source.
  • It also includes a built-in surge protector that protects your devices from any overload problems.
  • Three years warranty from the manufacturer

Pros

  • Start and stop remote control.
  • Water-resistant to a certain degree
  • Supplied with folding handle
  • Includes additional RV connectors
  • Meets the standard of CARB
  • You can operate the device for 17 hours without overloading or overheating problems.
  • Three years guarantee

Cons

  • The oil change could be a little difficult due to the position of the dipstick

Westinghouse iGen2200 Inverter Generator

The Westinghouse iGen2200 Inverter Generator is highly portable, so even if you move from one city to another, it’s not a problem to carry it around with you to your new home. In addition, it’s equipped with a kick start device and a wireless connection.

You can conveniently operate it remotely from your mobile phone, but you must be within 80 feet of the generator. This generator can easily run for 12 hours with no problem if you have fuel at total capacity in the tank.

It’s also supplied with a steel frame that allows the generator to operate in quiet mode. Unlike many other generators, this generator can only produce a noise level of 68 dBa, which is negligible if you are in a dense residential building.

Apart from gas heat furnaces, you can efficiently operate a sump pump, televisions, and power tools while you’re experiencing a simple power outage in your area. Apart from an additional RV connection, it has two sockets with 120V each. It also has a monitor that informs you about the voltage, operating hours, hertz, and heating. The oil shortage sensor shows you when to fill the tank or stop the appliance.

Features

  • With a 196cc engine and battery, you can start your machine easily.
  • It’s supplied with an ignition switch equipped with Cold Start Technology so that the machine remains in operation even in the cold season.
  • If you’re within 80 feet of the generator, you can easily control the stop and start button from your smartphone using the built-in mobile connection available with the generator.
  • It has a maximum start power of 4000 watts and a running capacity of 3500 watts, which is enough to power your home for at least 12 hours if you add the fact that it doesn’t make any noise above 68 dBa.
  • Four outlets are available. 2 sockets with 120V, 30A power source, and two sockets with 120V 20A power source.
  • It also includes a built-in surge protector that protects your devices from any overload problems.
  • Three years warranty from the manufacturer

Pros

  • Start and stop remote control.
  • Water-resistant to a certain degree
  • Supplied with folding handle
  • Includes additional RV connectors
  • Meets the standard of CARB
  • You can operate the device for 17 hours without overloading or overheating problems.
  • Three years guarantee

Cons

  • The oil change could be a little difficult due to the position of the dipstick

Firman W03081 Inverter Generator

The best part of the Firman 3000 Watt model is its portability. It is equipped with strong wheels and an easy-to-grip handle, which makes transporting this 97-pound inverter generator easy and convenient.

With a running power of 3000 watts and a surge wattage of 3300 watts, its performance is also very valuable for its price. The engine is powered by a 1.8-gallon fuel tank, which is a little bit larger than average, with only an average running time of nine hours.

The extensive control panel on the side of this portable generator is an exciting feature of the model. It has a light indicator, switches, and any sockets, all of which are protected from dirt thanks to the cover already fitted.

A final plus point is that FIRMAN supplies this inverter generator with a range of accessories such as oil, wrench, and a funnel.

Features

  • Running Wattage: 3,000 watts
  • Starting Wattage: 3,300 watts
  • Running time: 9 hours at 1/4 load.
  • The capacity of the tank: 1.8 gal
  • Noise Level: National part certified
  • Weight: 97 lbs
  • Produces clean electricity with less than 3% THD, has an eco-mode for maximum efficiency, and comes with a 3-year warranty.

Pros

  • Maintenance accessories included
  • Good performance
  • All controls are in one place for easy operation.

Cons

  • Average running time for tank size

Read Also: Best 3000 Watt Generators


Predator 3500 Inverter Generator

The Predator 3500 Watt Inverter Generator runs on a 212cc OHV engine with air cooling as standard. This engine is responsible for the impressive runtime of up to 11 hours at a quarter load which should be enough to get you through your next power outage.

This model is also compatible with a parallel set, making it an excellent option for motorhome travel. In addition, it’s equipped with a 30 amp RV adapter to make installment easier for you.

The LCD screen allows you to keep an eye on all the variables and monitor the power consumption, with the indicator lights showing the output and the overload warning. Although it doesn’t have an automatic shutdown when fuel consumption is low, it does have a warning light when it’s time to refuel.

Finally, it is a discreetly quiet model valued at 57 decibels. This is quite enough to carry along for camping without inconveniencing the neighbors and wildlife.

Features

  • Running Wattage: 3,000 watts
  • Starting Wattage: 3,500 watts
  • Running time: 11 hours at 1/4 load
  • The capacity of the tank: 2.6 gal
  • Noise Level: 57dB
  • Weight: 99.2 lbs
  • Includes a digital LED screen that shows overload, lack of oil, and power.
  • It also has four attached wheels for transport and electronic overload protection.

Pros

  • Long-running time
  • Parallel compatibility

Cons

  • No fuel gauge
  • Users report difficulties in understanding the manual

Frequently Asked Questions (FAQs)

What Portable Generator Size Can Run a Furnace?

A gas heat furnace with forced air usually requires a small amount of electricity to ignite and work in your home. Most gas furnaces use less than 600 watts of electricity or less than half of a typical 15 amp circuit.

The furnace uses this small amount of electricity to drive the blower or fan part of the furnace, which circulates the air in the house and also drives the suction fans to force the exhaust gases safely out of the house.

When it comes to buying a portable generator, consider some things before purchasing the first generator you see. The most important thing is that you need to find out the starting and running wattage for your furnace.

Most household furnaces consume about 600 watts depending on the manufacturer your furnace may use more or less. The easiest way to find out exactly how many watts your furnace consumes is to consult the manual or the manufacturer’s website to determine what wattage is required.

You could also find this on the manufacturer’s label at the back of the furnace. Once you’ve figured out how many watts your furnace needs, you’ll want to purchase a generator that supports at least twice the amount of wattage your furnace needs to avoid overloading your generator.

Most generator running times are measured at a power consumption of 50%. So if you are trying to get the most runtime out of your generator when operating your furnace, look for a generator that can deliver twice the wattage require by your furnace.

In this way, you can also switch on the other important appliances or equipment while your furnace is running. This can include a mobile phone charger, refrigerator, or other devices needed to help you survive your next power outage.

 

How Much Power Do I Need?

A great way to maximize the efficiency of your generator is through power management. The use of power management can help you do this:

  • Use a smaller, cheaper generator to meet your requirements
  • More efficient use of the generator

Power management works based on a simple concept: it is not necessary to supply power to everything at the same time. Switching from one device to another helps to minimize the amount of energy required.

Think about it:

  • What is the most important thing to power?
  • Must it be operated continuously?
  • Don’t try to run everything at once.

For example, suppose you use a generator to provide your house with electricity. In addition, you want to operate some lights, a fridge, a furnace, a television, and a microwave.

Appliance                     Starting Wattage           Running Wattage

Fridge                             1600                            200

Furnace (1/4 HP fan)      1600                             600

5 Lights                           300                              300

Television                        300                              300

Microwave                      1500                            1500

Total                                5300                            2900

If you only consider the total watts, you might think that you need a 5300-watt generator to power your home. But if that’s not the case. Instead, start essential appliances with high start wattage at different times.

When you start the fridge and the furnace at different times, you don’t need 3200 watts of power – only 1600. So if you only use an appliance occasionally for short periods, let it run alone.

Turn off the refrigerator and furnace for a few minutes while using the microwave – a slight compromise like this saves you 1500 watts. If you don’t mind turning off the lights and TV, you can use a smaller model. But if you don’t want the stress, go for a bigger generator.

Let’s look at our example again.

Continuous Power requirement

Running refrigerator                   200

Running furnace                         600

5 lights                                        300

Television                                    300

Total                                            1400

Occasional electricity demand

Starting the refrigerator              1600

Starting the furnace                    1600

Microwave                                   1500

Max                                              1600

In this case, a 3000-watt generator would be able to operate everything without any problems. And you don’t have to sacrifice anything.

With a transfer switch connected to your home’s circuit breaker panel, such generators can power an entire circuit rather than plugging in devices one at a time, which is what most people do with them.

Of course, you can get by with just 1600 watts as well – if you’re ready to run the furnace and fridge at separate times and turn off the TV and lights when you start using one or both of these larger devices.


Conclusion

To recap, we believe the best generators for a furnace are the ones listed below:

  1. Honda EU3000IS 3000W
  2. Champion 100302 4000-Watt
  3. Westinghouse iGen2200 Super Quiet
  4. Firman W03081 3300/3000 Watt
  5. Predator 3500 Watt Super Quiet

If you have read thus far then I believe you know the perfect generator size to power a furnace in your home.

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