Phoenix Journal · Extraction
A plain guide to the Regulatory Reform (Fire Safety) Order 2005 - what it is, who it names as the Responsible Person, and exactly where your kitchen extract ductwork sits inside it.
Case postmortem
The manager had a folder full of cleaning invoices, a spotless stainless canopy and a fire that started three metres above the ceiling tiles, in a length of duct nobody had opened in four years.
It was a busy fry-led kitchen, open sixteen hours a day. The visible canopy and filters were wiped down nightly and jet-washed monthly, so on paper the site looked well kept. What the paperwork never captured was the horizontal duct run above the suspended ceiling, where warm grease-laden air had been condensing and hardening since the last builder left. When a flare-up on the range drew flame into the extract, that hidden layer of grease behaved exactly as fuel does. The fire tracked along the duct, breached the compartment wall where the run passed through it, and did far more damage to the unit next door than to the kitchen itself.
Nobody had lied and nobody had cut a deliberate corner. The business simply did not understand what the law actually asked of it. This is a short, plain guide to the piece of legislation that sat behind that whole event - the Regulatory Reform (Fire Safety) Order 2005 - what it is, who it names, and where a commercial kitchen extract system fits inside it. If you would like the same ground covered without any of the case detail, we have written a companion piece on the Fire Safety Order in plain English.
The Regulatory Reform (Fire Safety) Order 2005 - usually shortened to the FSO, or just "the Fire Safety Order" - is the single main piece of fire safety law for almost all non-domestic premises in England and Wales. It swept away dozens of older certificates and rules and replaced them with one duty-based system. There is no fire certificate to hang on the wall any more. Instead, the Order says that if you have any level of control over a building, you carry a legal responsibility to understand the fire risks in it and to manage them.
The duties themselves sit mainly in Articles 8 to 22 of the Order. Article 9 is the one most people have heard of: the requirement to carry out a suitable and sufficient fire risk assessment. Article 17 is the one that catches kitchens: it requires that fire safety measures and equipment - which includes the extract ventilation that removes heat and grease-laden air - are subject to a suitable system of maintenance and are kept in efficient working order and in good repair.
The Order does not talk about "the owner" or "the landlord" as such. It invents a defined role: the Responsible Person. In a workplace that is, first, the employer, and then anyone else who has control of the premises or of the extract system within it - a managing agent, a head office, a franchisor, a facilities contractor. More than one Responsible Person can exist for the same building at the same time, and where they do, the Order requires them to cooperate and share information rather than assume the other has it covered.
This matters for extract cleaning because responsibility for the hidden duct run is exactly the sort of thing that falls between parties. The tenant assumes the landlord maintains the riser; the landlord assumes the tenant cleans what the tenant uses. The Order does not accept that gap. Somebody is the Responsible Person for that ductwork, and if you are reading this and you run the kitchen, it is very likely you.
Two things have sharpened the Order since it first appeared. The Fire Safety Act 2021 confirmed that a building's structure, external walls and flat entrance doors fall within its scope. Then Section 156 of the Building Safety Act 2022, in force from 1 October 2023, tightened the record-keeping duties considerably. Every Responsible Person must now record their completed fire risk assessment and their fire safety arrangements in full - not merely the "significant findings" as before - and must record the name of whoever carried the assessment out. The old exemption for premises with fewer than five employees is gone. In practice this means the state of your extract system, and the evidence that it is being cleaned, is now something you are expected to be able to produce on paper.
Reading the case back against the Order, the failures line up cleanly, and none of them were exotic.
The grease itself is the quiet villain in all of this. Deposited film hardens over months into a fuel that ignites readily and, once alight inside a duct, carries fire through a building far faster than most people expect - straight past fire doors and through the very compartment lines the building relies on to hold a fire in one place. That is why extract ductwork is not a hygiene footnote in a fire risk assessment. It is a route.
None of this requires heroics. It requires treating the extract system as part of your fire safety duty and being able to prove you have done so. In practice that is a short, repeatable loop.
The temperatures involved are not gentle. A grease fire in a duct can climb well past 300°C in moments, which is precisely why the Order treats the system that carries that risk as your responsibility rather than an optional extra. Get the loop above running and the extract system stops being the hole in your fire safety file and becomes one of the easiest parts of it to evidence.
Questions
Not by name, but it captures it squarely. Article 9 requires a suitable and sufficient fire risk assessment of the whole fire risk, which includes the grease fuel load inside your extract system. Article 17 requires that fire safety equipment, including the extract ventilation, is kept in efficient working order and good repair. Together they make cleaning and maintaining the full duct run a legal duty, not a discretionary bit of housekeeping.
It depends on who has control, and there can be more than one Responsible Person at once. If you run the kitchen you are almost always the Responsible Person for the extract system you use, even where the landlord owns the fabric of the building. The Order requires anyone with shared control to cooperate and share information, so the safest step is to agree in writing who cleans and maintains which parts of the system.
Enforcing authorities can issue enforcement or prohibition notices, restrict how you use the premises, or prosecute. A serious breach can carry an unlimited fine and up to two years in prison. Separately, most commercial insurance policies set a minimum extract cleaning frequency as a condition, so a poorly maintained system can also leave a fire or damage claim unpaid even before any enforcement action begins.
Phoenix Duct Clean · by the numbers
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