How to stay safe while keeping snug this winter

Ellie Brown 2024

Ellie Brown
Consultant, Assurity Consulting
24th October 2025

The London Fire Brigade has reported that over 160 fires are caused by electric heaters every year, and a third of electrical fires that ended in a fatality involved a heater. Below are some of the dangers of portable heaters, if they are not properly controlled:

  • Higher risk of ignition, as portable heaters can easily overheat.
  • An electrical overload may occur if you are plugging in a heater into an extension cable or power outlet, increasing the risk of electrical fires.
  • They can interfere with any centralised HVAC systems in place. This could lead to a potential waste of energy, as the systems are having to work overtime.
  • Some heaters can dry out the air, which in turn reduces humidity levels.
  • Poorly maintained units can emit dust and odours which will have an impact on the indoor air quality.

How to use your portable heater safely:

  • Make sure to keep the heater away from any combustible items or soft furnishing (e.g. curtains, blankets or paper storage); 
  • Before moving the heater, let it cool down first;
  • Make sure that the heater is well maintained. This can include regular testing within an office space (e.g. PAT testing) or carrying out visual checks prior to use at home; and
  • Keep the heater at a safe distance from others and away from walkways or escape routes. People with mobility issues are at higher risk of tripping or falling onto a heater.

Some alternative ways to keep warm this winter without portable heaters may include wearing more layers, using blankets, drinking warm beverages and keep moving around to increase your circulation!