Electric Heater Fires: Preventing and Managing Them

For many companies and individuals looking to cut back on energy bills, electric heaters are a tempting proposition. They offer a low cost way to heat targeted areas or top up existing heating without turning up the whole system.

But are electric heaters safe? Here, we explore the potential dangers of electric heaters, answer common questions, outline measures a responsible person(s) should put in place to use them as safely as possible, and exactly what to do should an electric heater fire occur.

Why are electric heaters dangerous?

Electric heaters are a common source of fires in buildings and workplaces, often started when blankets, clothing, or other combustible materials are left nearby. They can also create a trip or burn hazard for people in the vicinity, particularly those with mobility issues, and should be regularly inspected and maintained during fire risk assessments.

Can electric heaters catch fire?

Yes – electric heaters contain heating elements that reach a very high temperature, making them a potential source of ignition if placed near combustible materials. They also use a high wattage which can result in a fire if the heater, cable, or electrical wiring is faulty or poorly maintained. 

Can you leave electric heaters on all night?

Leaving electric heaters on overnight is not recommended. Leaving a heater unattended for any length of time increases the risk of fire. For wall-mounted electric radiators, it’s vital that all curtains and other combustible materials are kept well away from.

Can you cover electric radiators?

While it’s possible to cover a traditional radiator, it’s never advised to cover an electric radiator. A covered electric radiator is likely to overheat and cause a fire.

How do you use an electric heater safely?

It’s still possible to use a low-wattage, safe portable heater in a sensible way that keeps the risk of fire low.

To begin with, ensure the electric heater is in good working condition. Check the manufacturer’s instructions and follow them at all times. Also check the unit, power cable, and plug for damage before turning the heater on. 

Make sure all combustible materials are kept well away from the heater, and that it’s a safe distance from people. Place the heater on a level, stable surface somewhere it’s unlikely to cause an obstruction. Finally, avoid using an electric heater with an extension lead.

It’s not recommended to leave electric heaters unattended, so ensure they get turned off when individuals leave the space and they are no longer required. This keeps energy costs lower too.

What should you do if an electric heater causes a fire?

In the event of an electric heater fire, turn off the heater – but only if it is safe to do so. If it is possible to turn off the power at source, this is another option.

The best way to tackle an electrical fire is with a carbon dioxide fire extinguisher, so having units to hand in the workplace is essential. Never use water to put out an electrical fire – water conducts electricity and can cause dangerous sparks, shocks, or electrocution.

Remember, keeping smoke alarms and other fire warning systems in good working order can mean a fire is dealt with before it causes substantial damage or injury. For more fire safety advice, explore our news and resource centres, or sign up to our newsletter for regular updates on legislations, as well as product and fire safety information.