What Size Generator Do I Need To Run A Space Heater?

Confused about what size generator you need to run a space heater? You’re not alone. The wrong choice can leave you cold and frustrated.

We break down the math and factors involved, ensuring you pick the right generator for a warm and cozy space. Say goodbye to guesswork and hello to comfort.

Click Here To Check Recommended Generators

What size generator do you need to run a space heater?

To run a space heater, you’ll typically need a generator with at least 1,500 to 2,000 watts of output. Space heaters usually consume between 750 and 1,500 watts, but it’s essential to account for additional power needs and peak surges. Always check the heater’s wattage requirements to ensure compatibility.

Here is a table that shows the approximate space heater size, generator size, and room size based on some web sources:

Space Heater Size	Generator Size	Room Size
250 watts	500 watts	25 sq. ft.
400 watts	800 watts	40 sq. ft.
750 watts	1500 watts	75 sq. ft.
1000 watts	2000 watts	100 sq. ft.
1500 watts	3000 watts	150 sq. ft.
2000 watts	4000 watts	200 sq. ft.
2500 watts	5000 watts	250 sq. ft.
3000 watts	6000 watts	300 sq. ft.

Our Top 3 Recommended Generator

1. GENMAX 1000 Watt Portable Inverter Generator
2. Westinghouse 1500 Watt Portable Inverter Generator
3. WEN Gas Powered 2000 Watt Portable Generator

Types of Space Heaters and Their Power Requirements

The types of space heaters that are available are listed below.

Infrared Heaters

Infrared heaters are space heaters that use infrared rays to heat up objects and people directly, without heating up the air.

They are very efficient and quiet, and they can warm up a room quickly. They usually have a low wattage of around 1500 W, which means they can run well with an inverter generator.

Fan Heaters

Fan heaters are space heaters that use a fan to blow hot air into the room. They are good for heating up large spaces, but they can be noisy and dry out the air.

They usually have a high wattage of around 2000 W, which means they can also run well with an inverter generator, but they might use more fuel.

Oil-Filled Radiators

Oil-filled radiators are space heaters that use oil as a heat reservoir. They heat up the oil inside and radiate heat into the room.

They are very safe and silent, and they can keep a room warm for a long time. They have a very high wattage of around 2500 W, which means they might need a portable generator to run them.

Ceramic Heaters

Ceramic heaters are space heaters that use ceramic plates to generate heat. They are compact and lightweight, and they can heat up a small area quickly.

They usually have a low wattage of around 1500 W, which means they can run well with an inverter generator.

What size generator for sump pump?

Different Types of Generators Suitable for Space Heaters

Here are some of the most common types of generators that you can use to run a space heater.

Portable Generators

Portable generators are generators that run on gas or diesel and have wheels or handles for easy transport.

They are good for running high-wattage devices like oil-filled radiators or multiple devices at once. They are also loud, heavy, and require regular maintenance.

They also produce harmful emissions that need proper ventilation.

Inverter Generators

Inverter generators are generators that run on gas or propane and have an inverter that converts the power to a stable and clean output.

They are good for running low-wattage devices like infrared heaters or fan heaters, or sensitive devices like laptops or phones.

They are also quiet, lightweight, and fuel-efficient. They are also more expensive and have a lower capacity than portable generators.

Standby Generators

Standby generators are generators that run on natural gas or propane and are permanently installed in your home.

They are good for running your whole house, including your space heater, in case of a power outage. They are also very reliable, powerful, and automatic.

They are also very expensive, require professional installation, and need regular maintenance.

Solar Generators

Solar generators are generators that run on solar power and have batteries to store the excess energy.

They are good for running eco-friendly, low-wattage devices like ceramic heaters or LED lights. They are also very quiet, clean, and renewable.

They are also very costly, depending on the weather, and have a limited capacity.

Factors to Consider When Choosing a Generator for Your Space Heater

There are many factors to consider when making this decision, such as:

Heater Wattage and Generator Capacity

The most important factor to consider is the wattage of your space heater and the capacity of your generator.

You need to make sure that your generator can produce enough power to run your space heater, plus some extra for safety and other devices.

A good rule of thumb is to multiply the wattage of your space heater by 1.5 to get the minimum generator capacity you need.

For example, if your space heater has a wattage of 1500 W, you need a generator with at least 2250 W (1500 x 1.5) of capacity.

Fuel Type and Efficiency

Another factor to consider is the fuel type and efficiency of your generator. Different generators use different fuels, such as gas, diesel, propane, natural gas, or solar power.

Each fuel has its own advantages and disadvantages, such as availability, cost, performance, and environmental impact.

You also need to consider how efficient your generator is in converting the fuel into electricity.

Runtime and Fuel Capacity

Another factor to consider is the runtime and fuel capacity of your generator. Runtime is how long your generator can run on a full tank of fuel.

Fuel capacity is how much fuel your generator can hold at once. These factors affect how often you need to refuel your generator and how convenient it is to use.

You need to choose a generator that has a long runtime and a large fuel capacity for your space heater.

What size generator do I need for a 50 amp RV?

Portability and Size Constraints

Another factor to consider is the portability and size constraints of your generator. Portability is how easy it is to move your generator from one place to another.

Size constraints are how much space your generator takes up and how much it weighs. You need to choose a generator that is portable and compact for your space heater.

Noise Levels

Another factor to consider is the noise levels of your generator. Noise levels are how loud your generator is when running.

Noise levels affect how comfortable and enjoyable it is to use your space heater with your generator. You need to choose a generator that is quiet for your space heater.

Safety Features and Compliance

Another factor to consider is the safety features and compliance of your generator.

Safety features are how well your generator protects you from potential hazards such as fire, shock, or carbon monoxide poisoning.

Compliance is how well your generator meets the standards and regulations of your area or country.

You need to choose a generator that is safe and compliant for your space heater.

Budget and Cost-Effectiveness

The last factor to consider is the budget and cost-effectiveness of your generator. Budget is how much money you have to spend on your generator.

Cost-effectiveness is how much value you get from your generator in terms of performance, quality, and durability.

You need to choose a generator that fits your budget and is cost-effective for your space heater.

>> What size generator to run 200 amp service?

Practical Tips for Safely Running a Space Heater with a Generator

Here are some practical tips that you can follow to avoid any problems or risks while running a space heater with a generator.

Correctly Match Wattage

As we explained before, you need to make sure that your generator can produce enough power to run your space heater, plus some extra for safety and other devices.

If you use a generator that is too small for your space heater, you might overload or damage your generator or cause a fire.

If you use a generator that is too big for your space heater, you might waste fuel or money.

To correctly match the wattage of your space heater and your generator, you need to check the labels or manuals of both devices and follow the instructions.

You also need to use the right cords and plugs that are compatible with both devices.

Ensure Proper Ventilation

Generators that run on gas, diesel, propane, or natural gas produce harmful emissions such as carbon monoxide, which can be deadly if inhaled.

Space heaters that use gas or propane also produce emissions that need ventilation.

To ensure proper ventilation for your generator and your space heater, you need to place them in an open and well-ventilated area, away from windows, doors, or vents.

You also need to install carbon monoxide detectors in your home and check them regularly.

>> What is the best generator for food truck?

Regular Maintenance Checks

The third tip is to perform regular maintenance checks on your generator and your space heater.

Generators and space heaters need proper care and upkeep to function well and last long. If you neglect them, they might break down or cause problems.

Follow the manufacturers’ or experts’ instructions when performing regular maintenance checks on your generator or space heater.

You also need to clean them regularly and replace any worn-out or damaged parts.

Using Extension Cords Safely

Extension cords are useful when you need to extend the reach of your power source or device. They can also be dangerous if used incorrectly or carelessly.

Use only heavy-duty extension cords that are rated for outdoor use and have a grounding pin.

Also, use only extension cords that are long enough for your needs and do not have any cuts or damage.

Do not plug multiple extension cords together or use splitters or adapters and do not run extension cords under rugs, carpets, furniture, or water.

Avoid overloading extension cords with too many devices or exceeding their wattage limit. Keep extension cords away from heat sources or flammable materials.

>> What generator size to run window ac?

FAQs on What Size Generator To Run A Space Heater

Final Words

Choosing the right generator size for your space heater is crucial for both safety and efficiency.

From assessing your heater’s wattage to considering other household needs, you’ve learned the ropes.

Now you’re equipped to make a savvy purchase and keep cozy without a hitch.