Can Wall Heaters Catch on Fire?

A wall heater is an ideal addition to a space that doesn’t have a traditional heating option. Having one installed is an especially good idea when space is especially tight or where there is no plumbing to allow radiators.

Of course, wall heaters are there to heat up an area and this requires them to reach very high temperatures.

Can wall heaters actually catch fire? The chance of a wall heater combusting is very slim as there is no naked flame or open heat element. But with anything that produces heat, there will always be a chance of fire, especially if the heater is not attached in the correct manner or happens to malfunction.

Make sure to read the instruction guidelines provided with your wall heater and never cover the heater over.

Read on to find out what measures you need to take into account when purchasing and a wall heater.

infrared heater mounted to the wall

Points to consider when using a wall heater

People often dont realize that there are quite a number of factors regarding choosing the perfect wall heater. 

The first of these is power consumption, you should be aware that different heaters require different power, this is measured in watts. 

The wattage should be readily available on the box or online specifications, typically a wall-mounted heater runs at 1500 KW.

To determine the cost of the wall heater you need to do a simple sum:

  1. Multiply the wattage by the number of hours you require the heater turned on.
  2. Multiply this figure by the cost of your energy supplier’s cost of kilowatts per hour.
  3. Divide this number by 1000, this will give you the cost of using your heater per day.

When positioning your heater onto the wall you need to make sure that it will not be in an area that could be covered, for example behind an opened door or window. 

You should also make sure that it is at a height where the controls and thermostats are out of reach of small children.

Make sure to use the correct fixings when fixing the heater to the wall as they can be extremely heavy, and never try to hang a wall-mounted heater by yourself.

Never cover your wall heater with anything flammable, the heat from the heater could become intense if the wall heater is covered resulting in damage to your heater or could even cause a fire.

If there is a fire you should never throw water onto the heater, the wall heater uses electricity to produce heat, throwing water onto it could cause electrocution.

Instead, you should turn off the electricity at your fuse box, ring the fire brigade, and use a Co2 fire extinguisher if you have one. Never try to tackle a fire that is out of control.

A wall heater should be wired into the main power supply by a professional electrician unless it is a plug-in heater.

When using a heater that plugs into the mains, make sure to route the wire in a way that stops any hazard like snagging or tripping, sagging wires should be tacked back.

How to install wall heater with built-in thermostat 

Can you leave a wall heater on overnight?

Wall heaters are used in a variety of ways and can be bought in different sizes and shapes, this makes them ideal for the home. 

They are also a popular choice for heating patios outdoors during the winter.

Most wall heaters come with a thermostat that allows the heater to operate between certain temperatures and an automatic shutoff if the temperature exceeds a safe limit.

Wall-mounted heaters have various safety features that can detect if a heater has become faulty and will trip your electricity or break a fuse in the appliance to render the heater inoperable and require you to get it repaired.

Because of this the likelihood of there being any danger to leaving a wall-mounted heater turned on is minimal, but beware that using an electric heater can dry the air out and cause headaches.

A portable heater should never be left unattended and turned on, these heaters are designed to be used in certain circumstances where they can be monitored and dont have the same features as a professionally fitted wall mounted heater.

If you do want to leave a wall-mounted heater turned on during the night, always make sure that there is plenty of space around the heater, never block in a heater or cover it over with anything, especially when using indoors.

Can wall heaters cause carbon monoxide?

No, electric wall heaters can not cause carbon monoxide poisoning as there is no fuel to burn in an electric heater.

Electric heaters provide heat by an electric current running through a filament and producing infrared heat or thermal heat. The heat is dissipated through a heat shield or heat reflector.

Only space heaters that use kerosene, gas, or oil will produce carbon monoxide, if you decide on using one of these you need to get it regularly checked by a professional.

You should also invest in a carbon monoxide monitor, this will give you an early warning if your heater is releasing any Co2.

Can I sleep with a gas space heater on?

You should never use a gas space heater in an enclosed space and should certainly not sleep with one on.

As mentioned earlier they do produce Co2 which is an odourless gas that starves the air of Oxygen and can be lethal if breathed in, even in a short period.

Some space heaters have a chimney that can be used to remove the gases emitted to the outside, these are the only storage heaters that should be used inside.


Electric wall heaters have a minimum chance of setting on fire as they have built-in safety devices that will stop a wall heater from operating if they develop a fault.

They are a great option if you’re deciding between electric and gas patio heaters.

Fire is more than likely to be caused by improper use or from placing items against it or covering the heater.

When using a gas heater, remember to never operate it during times when you are sleeping, have plenty of ventilation, and get them regularly maintained by a professional.