Extinguishers
Wrong extinguisher type for the risk — how to put it right
Someone has questioned whether the extinguishers on site suit what is actually in the building.
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Short answer
Extinguisher provision follows the fire classes present in each area, not a fixed count per floor. The frequent errors are water near electrical equipment, powder used indoors in occupied spaces, and kitchens with deep fat frying that have no wet chemical unit.
Matching the extinguisher to the class of fire
A quick reference for the risks we see most in commercial premises and HMOs:
- Class A (paper, textiles, timber) — water or foam.
- Class B (flammable liquids) — foam, CO2 or powder depending on setting.
- Class F (cooking oils and fats) — wet chemical, nothing else is appropriate.
- Electrical risk — CO2, sited so it does not encourage use on a live board unnecessarily.
- Class D (metals) — specialist powder only, and rare outside industrial settings.
The mismatches we find most often
Water extinguishers positioned next to consumer units or server cabinets. ABC powder units inside small offices and corridors, where a discharge would destroy visibility on the escape route. Kitchens with a fryer and only a foam unit. And multi-occupancy hallways where the extinguishers were correct for the building's previous use and were never revisited after a change of use.
How provision should be calculated
Class A cover is generally worked out from floor area and rating, then supplemented with specific units for the point risks identified — kitchens, plant, electrical intake, flammable stores. The output should be a floor-by-floor schedule, which is exactly what a fire risk assessment site visit produces.
Signage and siting go with it
The right unit in the wrong place still fails. Extinguishers belong on a bracket or stand near the exit route from the risk, at the correct height, with the corresponding ID sign above so they can be found in poor visibility.
Questions we get asked about this
Can I use powder extinguishers everywhere to keep it simple?
Powder is versatile but inappropriate indoors in occupied premises because a discharge severely reduces visibility and creates an inhalation hazard on the escape route.
Do I need an extinguisher in every room?
No. Provision follows travel distance and the risks present, so a schedule usually places units on escape routes and adjacent to specific hazards.
Will you swap units in as part of a service visit?
Yes. Where the provision is wrong we quote the change and can usually complete it on the servicing visit.
Not sure your cover matches your building? We will schedule it room by room as part of the visit.
Other common fire safety problems
Fire alarms
Fire alarm keeps beeping — what the sound is telling you
Fire alarms
Repeated false alarms — finding the cause instead of living with it
Fire alarms
Amber fault light on the fire alarm panel — how to read it
Compliance & enforcement
Asked for a fire alarm certificate and you haven't got one
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