Home / Kitchen Extraction Cleaning / Guide
Extraction cleaning - the standards
It sounds like hair-splitting - TR19, TR19 Grease, what does one extra word matter? It matters a great deal, because confusing them can mean your kitchen extract is cleaned to the wrong standard, or not really cleaned at all.
The short answer
Plain TR19 is ambiguous - it can refer to general ventilation hygiene or, in its old form, to kitchen grease. Kitchen extract fire safety is now its own standard, TR19 Grease. The distinction matters because a kitchen extract system needs cleaning specifically to TR19 Grease, and a clean sold vaguely as TR19 might be to the general-ventilation standard, or to nothing in particular - leaving the fire risk your kitchen actually has unaddressed.
Why the ambiguity exists
The confusion has a history. The original TR19 was a single document covering the internal cleanliness of ventilation systems in general, and it included, in one section, the cleaning of grease from kitchen extract. So for years TR19 was the term people used for all ductwork cleaning, kitchen grease included. Saying TR19 covered everything, more or less.
That changed when kitchen grease was recognised as a distinct discipline and split into its own standalone standard, TR19 Grease, with the general-ventilation side becoming TR19 Air. So today plain TR19 is a leftover term that no longer maps cleanly onto one thing - it can mean the general ventilation standard, the old combined document, or be used loosely for kitchen grease. The ambiguity is what makes the distinction matter.
Why it matters for a kitchen
For a commercial kitchen, the distinction is not academic. Your kitchen extract system carries grease and the fire risk that comes with it, and the standard that addresses that risk - the whole-system cleaning, the grease-deposit measurement, the fire-safety focus - is TR19 Grease specifically. That is the standard your extract needs to be cleaned to, because it is the one built for the hazard your kitchen actually has.
The general ventilation standard, TR19 Air, is concerned with air quality, not grease fire risk, and does not address a kitchen extract system the way TR19 Grease does. So it genuinely matters which one your kitchen extract is cleaned to - the right standard controls the fire risk and produces the fire-safety evidence you need; the wrong one does not, however clean the ductwork looks.
How confusion leaves you exposed
The practical danger is a clean sold vaguely as TR19. If a contractor offers to clean your kitchen extract to TR19 without specifying Grease, you cannot be sure what you are getting - a proper fire-safety clean measured to the grease standard, or something addressed to the general-ventilation standard, or simply a clean using the term loosely with no real standard behind it. The word Grease is what pins it to the fire-safety discipline your kitchen needs.
That vagueness can leave you exposed in exactly the way that matters. A kitchen extract clean that is not actually to TR19 Grease may not control the fire risk properly, may not produce grease-deposit measurements, and may not give you the verification an insurer or fire risk assessor expects for a kitchen system. You could hold a certificate that says TR19 and still not have the TR19 Grease compliance your kitchen extract requires.
What to insist on
The fix is simple: for a kitchen extract system, insist on TR19 Grease by name, not just TR19. Ask that the clean is to TR19 Grease, that it covers the whole system, that grease deposit is measured, and that you receive a TR19 Grease verification. Naming the standard precisely is what ensures you get the fire-safety clean your kitchen needs rather than something vaguer.
The same precision helps everywhere the standards touch. If your building also has general ventilation needing attention, that is TR19 Air, and naming it correctly ensures that system is addressed properly too. Being precise about which standard applies to which system is what turns the confusing family of TR19 terms into a clear picture of what each part of your building needs.
The takeaway
The distinction between TR19 and TR19 Grease comes down to one word that decides whether your kitchen extract is cleaned to the standard built for its fire risk. Plain TR19 is a leftover, ambiguous term; TR19 Grease is the specific standard your kitchen extract needs. Treating them as interchangeable is how a kitchen ends up with a clean that does not do the job its extract system actually requires.
So when it comes to your kitchen extract, do not accept TR19 as a catch-all - ask for TR19 Grease, and make sure that is what you get, verified. The extra word is the difference between a clean that controls your fire risk and evidences it, and one that might not. In a matter of fire safety, that distinction is well worth insisting on.
Questions
Because plain TR19 is ambiguous - it can mean general ventilation hygiene or, in its old form, kitchen grease. A kitchen extract system needs cleaning specifically to TR19 Grease, and confusing the terms can mean the wrong clean for your fire risk.
No. TR19 was originally a combined document covering general ventilation and, in a section, kitchen grease. Kitchen grease is now the standalone TR19 Grease standard, and the general side is TR19 Air. Plain TR19 no longer maps cleanly onto one thing.
TR19 Grease specifically - it is built for the grease fire risk a kitchen extract carries, with whole-system cleaning, grease-deposit measurement and fire-safety verification. The general ventilation standard, TR19 Air, does not address it the same way.
You cannot be sure what you are getting - a proper TR19 Grease fire-safety clean, something to the general-ventilation standard, or the term used loosely with no real standard. It may not control your fire risk or give you the verification an insurer expects.
TR19 Grease by name for kitchen extract - not just TR19. Insist the clean is to TR19 Grease, covers the whole system, measures grease deposit, and comes with a TR19 Grease verification.
Yes. A certificate saying TR19, without Grease, may not represent the fire-safety clean your kitchen extract requires. Naming the standard precisely is what ensures you have the compliance you need.
We clean kitchen extract specifically to TR19 Grease and verify it - the right clean by name, not a vague 'TR19' that might miss the point.
