Phoenix Journal · Ductwork
A clean kitchen is worth very little at renewal if you cannot prove it. Here is how the right cleaning data shifts the conversation with your insurer from trust to evidence - and often from a higher premium to a lower one.
Insurance · Kitchen extract
When your renewal quote lands, the gap between simply paying it and arguing it down is rarely charm - it is evidence.
Underwriters price commercial kitchen cover on risk they can see. More than 70% of commercial kitchen fires start in the extraction system, where grease builds inside the canopy, filters and ductwork and turns a hot flue into a fuel store. If your insurer cannot tell how well that risk is controlled, they assume the worst and price accordingly. The good news is that the same records which keep a fire claim valid are the records that give you leverage on price.
So this comes down to a straightforward choice at renewal. You can present your kitchen on your word alone, or you can present it on documented data - the TR19 Grease post-clean verification reports, deposit readings and cleaning logs that show the system is genuinely under control. Below we weigh both approaches, then set out the three numbers your insurer actually cares about.
This is the default for most operators. You tell the broker the kitchen is cleaned, the quote is prepared on that assurance, and nobody digs any deeper unless something goes wrong. It is quick, and on a quiet renewal it can feel like the path of least resistance.
Here you turn up to the renewal with a file. Every clean is backed by a TR19 Grease post-clean verification report: before-and-after photographs taken from matching positions, and grease measured with a Wet Film Thickness Test or Deposit Thickness Test against the recognised thresholds. You can show what the ductwork looked like, what it reads now, and when it will next be cleaned. This is the position that lets you argue.
The numbers that move a premium
An underwriter does not want a story about your kitchen - they want figures they can verify. These three do most of the work.
Bring these to the table and you change the nature of the discussion. Instead of asking the underwriter to take a risk on trust, you are handing them measured evidence that the biggest hazard in the building is documented, dated and under control. That is the difference between accepting a premium and arguing it down.
Questions
Most want dated evidence that your kitchen extraction system is cleaned to the TR19 Grease standard by a competent contractor. In practice that means a post-clean verification report for each visit, showing before-and-after photographs from matching positions and grease measured with a Wet Film Thickness Test or Deposit Thickness Test. A simple invoice that says the canopy was wiped down is not enough to price a risk or defend a claim.
It can, though no one guarantees a fixed discount. Underwriters price on controls they can verify, and documented, regular extract cleaning with post-clean readings is exactly that kind of control. Some insurers offer reductions of up to around 15% where kitchens evidence proper cleaning and suppression checks, and even where the headline premium holds, strong records give you the standing to challenge loadings you would otherwise just have to accept.
TR19 Grease links frequency to how many hours a day you cook. Heavy-use kitchens running roughly 12 to 16 hours a day are recommended every three months, moderate use of 6 to 12 hours every six months, and light use every twelve months. Matching your schedule to your actual cooking hours - and being able to show it - is part of what makes the record credible to an insurer.
Phoenix Duct Clean · by the numbers
Phoenix surveys and cleans kitchen and building ductwork to the TR19 standard - measured, cleaned and certificated, UK-wide.