A question for those involved in writing, auditing, or enforcing workplace fire policies:

Why do so many policies prohibit "under-desk heaters" rather than defining the specific heating technologies that create the risk?

In my experience, the phrase "under-desk heater" is often used as a catch-all term, but it can cover a wide range of products that operate very differently.
For example, a portable 2kW fan heater and a 2kW convector heater are commonly restricted in workplaces, and it's easy to understand why organisations may be concerned about high-power portable appliances being used in confined spaces around cables, paper, bags and other combustible materials.

However, newer heating technologies have emerged that don't rely on warm air circulation or convection. Some use far-infrared heat, operate at significantly lower power levels, and have no fans or air movement.

Should workplace policies continue to focus on the location ("under desk"), or would it be more appropriate to focus on the heating method, power consumption, and overall risk profile of the appliance?

I'm genuinely interested in how fire risk assessors, insurers, facilities managers and H&S professionals approach this.

Are blanket bans on "under-desk heaters" still the right approach, or should policies evolve to distinguish between different technologies?

Interested to hear different perspectives, especially from those who have had to justify these policies following a risk assessment.

I'm assuming that this is related to removing the risk. SOME portable heaters contain an exposed element, which is a fire risk; these are the FAN heater type. We often prefer the oil-filled radiator type portable heater, but these generally don't provide as much heat and are far more expensive. The company probably just blanket-bans all portable heaters as it's easier to police. Just my opinion, though.

Thanks for the comment and yes, I agree it's probably easier to police by just using a blanket term and banning all heaters. New far infrared alternatives are now available specifically designed for under desks which focus on heating the person / object instead of heating the air. Meaning they don't rely on warm air flow and have no air vents and usually regulated to a max 60 °C surface temperature. And usually only use between 200 to 400 watts of energy per hour. Some companies have numerous staff sat at desks in an open warehouse environment or hard to heat area and have now banned under desk heaters completely. My post is related to people generalising 'under desk' heating without actually assessing and highlighting the exact products that can cause a fire hazard. I.e. electric warm heater or convector heater.

Zero tolerance is 'easy' for an end organisation but as a fire risk assessor I take a more pragmatic approach, particularly in older buildings or locations where it's obvious a top up heating solution is needed and look more at the type of heater, it's location, the surrounding materials and processes and the PPM regime. It's quite possible to use them safely.