Cost & commercial
The honest answer is that there is no single price. A kitchen duct clean is priced on the system in front of you - its size, its grease load and how reachable it is - which is why any real figure starts with a survey, not a rate card.
The short answer
People want a single number for kitchen duct cleaning, and reputable cleaners will not give one blind. The cost reflects the system: a small single-canopy setup and a multi-storey riser system are different jobs with different day-lengths. What you can get quickly is a survey, and from that a firm figure. Anyone quoting a fixed price before seeing your ductwork is guessing - and usually guessing low to win the work.
Why the certificate is not a line item
The most common misunderstanding is that a TR19 Grease certificate is a fixed-price product you buy. It is not. The certificate is issued at the end of a comprehensive clean and inspection of the whole system - and the cost sits in that work, not in the piece of paper. A larger or dirtier or harder-to-reach system needs more labour, more equipment and more time, and the price moves with it.
That is why two kitchens on the same street can pay very differently for what looks like the same service. One has short, accessible runs cleaned every few months; the other has long concealed ductwork that has not been touched in years. The certificate they each receive looks similar, but the job behind it - and therefore the price - is not.
What actually moves the figure
In practice a handful of things decide the number: how big the system is and how far it runs, how much grease has built up, how easy the ductwork is to reach, whether there are vertical risers or roof plant that mean working at height, and whether the work has to happen overnight to protect trading. On top of the clean itself sit the verification and certification - the deposit testing, the qualified technician time, the report and the register entry - all of which are part of a compliant price.
None of that can be read off a list. It is why the sensible first step is a survey: a short inspection that measures the grease in microns, checks what is reachable and turns those factors into a defensible figure. A quote built that way tells you what you are paying for; a flat rate quoted sight-unseen tells you nothing except that someone wants the booking.
So what should you expect in 2026?
In 2026 the picture is unchanged in principle: a light, accessible, regularly maintained system sits at the lower end of the range, and a large, neglected, hard-to-reach one at the upper end - with everything in between decided by the factors above. The useful thing to ask for is not a headline price but a survey and an itemised quote, so you can see where the cost is and compare like for like. That is how you tell a fair price from a cheap one that will cost more later.
Questions
Because the cost reflects your specific system - its size, grease load and how reachable it is. A small accessible setup and a large concealed one are different jobs. A survey turns those factors into a firm figure; a flat rate quoted blind is a guess.
No. The certificate is issued after a full clean and inspection of the system. The cost sits in that work, not in the certificate, so it varies with the size, condition and accessibility of your ductwork.
System size and run length, grease load, access provision, any risers or roof plant meaning work at height, whether the job runs out of hours, and the verification and certification work included in a compliant clean.
The principle is the same - price tracks the system and the scope. A well-maintained, accessible system stays at the lower end; a neglected, hard-to-reach one costs more because it takes longer and needs more work.
Book a survey. A short inspection measures the grease, checks what is reachable and produces an itemised quote you can compare like for like - far more useful than a headline price given before anyone has seen the ductwork.
Phoenix Duct Clean · by the numbers
We survey your ductwork, then quote against what is actually there - the size, the grease load and the access - so the number means something instead of guessing from a rate card.