The use of portable space heaters and electrical fires.

Published by Don Hester on

Electrical fires can be caused by a variety of factors, but one common cause is the use of portable space heaters. These heaters, which are often used as a primary or supplementary source of heat in a room or area, can be a fire hazard if not used properly. Often we see an increase of electrical fires and property damage in the winter time.

CPSC estimates that portable heaters, including electric space heaters, were involved in an average of 1,700 fires per year, resulting in an average of 70 deaths and 160 injuries annually from 2017 to 2019.

CPSC Warns Consumers to be Cautious When Using Space Heaters, Furnaces and Fireplaces This Winter

One of the risks associated with portable space heaters is overheating a receptacle or circuit.

Overheating receptacles can occur when a space heater is plugged into an outlet or circuit that is not able to handle the electrical load. This can happen for a few reasons:

  • The outlet and/ or circuit  is not rated for the wattage of the heater: Some space heaters can have a high power consumption and may require an outlet and circuit with a higher amperage rating.
  • The outlet is damaged or worn: Outlets can become damaged over time, especially if they are used frequently. A damaged outlet may not be able to handle the electrical load and can overheat, creating a fire hazard.
  • The outlet is overloaded: Plugging too many devices into the same outlet or circuit can overload it, causing it to overheat.

To prevent this, it is important to make sure that the space heater is plugged into an outlet that is rated for the wattage of the heater, and to avoid using damaged or worn outlets.

A portable space heater was plugged into this receptacle


Electricity, a force both great and wild

Can light our homes and make our lives mild

But when it’s not controlled, it can cause fires

Leaving destruction and a trail of desires

The sparks fly high, the flames they dance

A deadly game of chance

The smoke it fills the air

A warning of the danger that’s there

The wires they melt, the circuits fry

A sight that makes one want to cry

The smell of burning plastic lingers on

A reminder of the damage that’s done

So let us be mindful of the power we wield

And take the proper precautions, to keep our homes shielded

For electricity can be a friend or a foe
It’s up to us to ensure, that it’s always under control.


 It is also important to avoid overloading outlets by only plugging in the necessary devices at a time.

You should  regularly check the outlet for any signs of overheating, such as discoloration, sparks, or a burning smell. If you notice any of these signs, you should immediately unplug the heater and stop using the outlet until it has been inspected by a qualified electrician.

Another risk associated with portable space heaters is the use of extension cords. These cords can become overloaded and overheat, which can lead to a fire. It is important to use the heater with a properly rated outlet and to avoid using extension cords, if possible.

Always use a space heater with a built-in thermal cutoff switch or overheat protection. This will automatically shut off the heater if it begins to overheat, helping to prevent fires.

You should always unplug portable space heaters when they are not in use or when you are not present in the room. This helps to prevent fires caused by overheating or other malfunctions, as the heater will not be able to operate if it is not plugged in. Additionally, unplugging the heater will help to save energy and reduce your electricity costs.

It is also important to note that portable space heaters should never be left unattended when they are in use. This includes when you are sleeping or when you are away from home. It is also best to turn off the heater before leaving the room or going to bed.

The space heater should be  tested and certified by a reputable testing organization, such as Underwriters Laboratories (UL). This ensures that the heater meets safety standards and is less likely to cause a fire.

Finally, it is important to regularly inspect and maintain the heater to ensure that it is in good working condition. This includes cleaning the heater, checking the cord and plug for any damage, and making sure the heater is not leaking any fluids.

To prevent electrical fires caused by portable space heaters, it is important to use the heater safely and properly, to use a heater that has been tested and certified by a reputable organization, and to regularly inspect and maintain the heater.



In general, it is always a good idea to be extra cautious when using portable space heaters and to follow the manufacturer’s instructions for safe use. Unplugging the heater when it is not in use or when you are not present is one simple step you can take to reduce the risk of a fire.

If you find any errors or have additional information that would expand on any code, building standards or manufacturer requirements please let me know.

NCW Home Inspections, LLC  is a Licensed Washington State Home Inspection service located in Wenatchee Washington serving Chelan County, Douglas County, Kittitas County, Okanogan County and Grant County Washington and the cities of Wenatchee, Leavenworth, Cashmere, Oroville, Cle Elum, East Wenatchee, Quincy and many more…  

Your Wenatchee and Chelan Professional Real Estate, Home and Structural Pest Inspection Service

Coordinator & Instructor- Fundamentals of Home Inspection-  Bellingham Technical College

Former WA Home Inspector Advisory Licensing Board

www.ncwhomeinspections.com                                                   509-670-9572

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