News — October 2026
Class F Fire Extinguisher Requirements 2026
Commercial kitchens remain the highest-risk fire environment for businesses. With increased enforcement activity in 2026, fire safety inspectors are paying closer attention to whether kitchens with deep-fat fryers have the correct wet chemical extinguisher — not just any extinguisher. Here is what the responsible person must have in place.
Key requirement
A wet chemical extinguisher (yellow band, BS EN 3) must be placed within 30 metres of any Class F cooking oil hazard in a commercial kitchen under BS 5306-8. It is not optional for premises with deep-fat fryers. The RRO 2005 responsible person duty requires appropriate fire-fighting equipment for the hazards present — Class F is a specific hazard requiring a specific extinguisher type.
What the 2026 enforcement picture shows
Fire safety enforcement data for the first half of 2026 shows that commercial kitchens — particularly in small cafes, takeaways, and care home kitchens — continue to be a significant source of enforcement notices. The most common finding is not the absence of any extinguisher, but the presence of a CO₂ or water extinguisher only with no wet chemical unit. CO₂ and water extinguishers are not rated for Class F fires and can make a cooking oil fire significantly worse.
What Class F fires are and why they need a different extinguisher
Class F fires involve cooking oils and fats that have reached or exceeded their auto-ignition temperature. Burning cooking oil is not the same as a Class B flammable liquid fire — it burns at extremely high temperature, produces burning splatter, and can re-ignite even after apparent extinguishment if the oil remains above auto-ignition temperature. Water thrown onto burning oil causes a violent steam explosion, projecting burning oil and escalating the fire dramatically.
A wet chemical agent works by simultaneously cooling the oil below auto-ignition temperature and saponifying the surface (forming a soapy foam seal) that prevents re-ignition. No other portable extinguisher type achieves both effects. See our full wet chemical extinguisher guide for deployment instructions and placement requirements.
What the responsible person must document
The fire risk assessment must record: the Class F hazard; the extinguisher provision; the maintenance record (annual service under BS 5306-3); and staff training on the unit. Staff should know where the extinguisher is, what it is for, and that they should never attempt to use any other extinguisher type on a cooking oil fire. See our kitchen fire prevention guide for the full range of controls.
Related provisions: fire blanket
A fire blanket (to BS EN 1869) should also be provided in commercial kitchens for small pan fires. It is a complement to the wet chemical extinguisher, not a replacement. See our fire blanket use guide for deployment steps and the types of fire it is and is not suitable for.
Frequently asked questions
FAQ