Phoenix Journal · Ductwork
Handing a live kitchen to a contractor goes wrong when everyone assumes someone else is in charge of the room. Here is the running order that keeps the work safe and the service running.
Case postmortem
A duct crew arrived at 11am to clean a kitchen extract system, and by 11:40 the site was in full evacuation - during a live lunch service - because nobody had agreed who was in charge of the room.
Here is how it unfolded. The booking said "morning access, kitchen quiet." It was not quiet. The head chef was prepping for a hundred covers, six burners lit, the canopy running. The cleaning technicians needed to open access panels along the horizontal ductwork, drop the fan, and work over the cooking line. To reach the plenum they set up steps directly over a live range. Someone switched the extract fan off at the isolator to work on the impeller - which meant the grease-laden air from the still-burning hobs had nowhere to go. Heat and smoke built under the canopy, the aspirating detector picked it up, and the alarm sounded. Service stopped. The kitchen lost the better part of a day, the client lost a room full of bookings, and the contractor lost the account.
Nothing here was exotic. No one was hurt. That is exactly why it is worth taking apart, because every failure in the chain was a management decision that was never actually made - it was assumed. Managing a contractor on a live site is not about trusting good people to be careful. It is about deciding, in advance and in writing, who controls the space, what has to be switched off before a spanner is lifted, and what "done" looks like when they leave.
Those three anchors matter because they turn a vague sense of "being careful" into specific, checkable actions. A site induction is a legal expectation, not a courtesy. The cleaning standard is measurable, so you can define the finish line before the job starts. And a permit to work is the mechanism that stops a technician touching a live system until someone with authority has confirmed it is safe to touch. Skip any one of them and you are relying on luck, which is precisely what ran out in the scenario above.
Strip the incident back and there was no single villain. There was a series of small gaps, each survivable on its own, that lined up into a real event.
The common thread is assumption standing in for agreement. Under the Regulatory Reform (Fire Safety) Order 2005 the "responsible person" - the operator or the person in control of the premises - carries the duty to keep the place safe, and that duty does not pause because a contractor is on site. If anything it sharpens, because now there are two organisations who each assumed the other had it covered.
You do not need a bigger safety department to prevent this. You need a short, disciplined sequence that happens the same way every time, whether the job is a single canopy or an estate-wide programme. Treat the list below as the running order for handing a live space to a contractor and getting it back cleanly.
None of this slows a competent contractor down. A firm that works to TR19® Grease expects to be asked for RAMS, expects to be inducted, and expects to isolate before it opens a system - because that is how the standard is written and how insurers now read it. The friction only appears when a site treats the visit as "someone popping in to clean the ducts" rather than as controlled work on live plant. Get the controller of the space named, the isolations permitted, and the finish line defined against a measurable standard, and the day that went so badly wrong in the scenario above becomes an unremarkable three hours that nobody remembers - which is exactly what good contractor management looks like.
Questions
For a straightforward clean with no cutting or welding, a full hot-works permit may not apply, but you should still run the isolations as a formal, signed step rather than a casual favour. The point of a permit is to force the right questions - is the cooking line off, is the gas isolated, is the fan locked off safely - before anyone opens a system. If the work involves grinding, drilling or hot works to reach the ductwork, a permit to work with a fire watch becomes essential.
Under the Regulatory Reform (Fire Safety) Order 2005 the responsible person - the operator or whoever is in control of the premises - keeps their duty to keep the place safe even while a contractor is on site. The contractor has their own duties under CDM 2015 for the way they carry out the work. In practice both share it, which is exactly why you should name the site's responsible person and the contractor's supervisor before the job starts so there is no gap between them.
Ask for project-specific RAMS written for your kitchen rather than a generic template, and confirm the technicians are trained to the TR19 Grease specification. A firm that certifies to that standard will usually hold BESCA Ventilation Hygiene Elite membership and register each clean on the BESCA portal, which gives you evidence that stands up to an insurer or fire risk assessor. Vague paperwork and a reluctance to be inducted are reliable warning signs.
Phoenix Duct Clean · by the numbers
Phoenix surveys and cleans kitchen and building ductwork to the TR19 standard - measured, cleaned and certificated, UK-wide.