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Kitchen extraction - TR19 vs generic
Two providers can both clean your ductwork, and both can leave it looking clean. But only one is doing it to a recognised standard, measuring the result, and proving it. The difference between a BESA TR19 clean and a generic one is not mainly effort - it is measurement, verification and evidence.
The short answer
A generic duct clean cleans the ductwork to the provider's own judgement, leaving it looking clean but with nothing defining or proving how clean. A BESA TR19 clean is done to a recognised standard with defined, measurable grease limits, and crucially verifies the result - measuring the grease deposit against the standard and documenting it with photographs and readings. The difference is not mainly effort but the standard, the measurement and the evidence: TR19 proves the system is clean to a defined benchmark, where a generic clean only asserts it.
They can look the same
The confusing thing about the difference between a TR19 clean and a generic duct clean is that, on the surface, they can produce a similar-looking result - ductwork that appears clean. Both involve cleaning the system, and a competent generic clean can leave the accessible parts looking perfectly clean. So it is easy to assume the two are much the same job, perhaps at different prices, and that a generic clean at a lower price is simply a cheaper way to the same outcome.
But that assumption misses where the real difference lies, which is not in how the ductwork looks afterward but in whether the clean was done to a defined standard, measured, and proven. A clean-looking duct tells you it looks clean; it does not tell you it meets a recognised standard, or that anyone measured whether it does. The difference between TR19 and generic is precisely in those things - the standard, the measurement, the verification - which do not necessarily show in the appearance but make all the difference to whether you have a proven, compliant clean or just a clean-looking one.
The standard
The first difference is the standard. BESA TR19 Grease is a recognised specification that defines what an acceptably clean kitchen extract system is, in measurable terms - it sets out the grease-deposit limits the system must meet, expressed in microns. So a TR19 clean has a defined benchmark it is cleaning to: a specific, measurable standard of cleanliness that the result is judged against. There is an objective definition of what clean means, set by the standard, not by the provider.
A generic duct clean has no such defined standard. It cleans the ductwork to the provider's own judgement of clean - which may be perfectly diligent, but is not measured against any recognised benchmark. So clean means whatever the provider decides it means, with nothing external defining or verifying it. This is the foundational difference: TR19 cleans to a defined, measurable standard, while a generic clean cleans to an undefined one. Everything else - the measurement, the evidence - follows from whether there is a defined standard to measure and verify against, which TR19 has and a generic clean does not.
The measurement and verification
Because TR19 defines cleanliness in measurable terms, a TR19 clean measures and verifies the result. The grease deposit is measured against the standard's limits - typically with a Deposit Thickness Test - to confirm the system is genuinely below the compliant threshold after cleaning, and the verification is documented with before-and-after photographs and the measured readings. So a TR19 clean does not just clean the system; it proves, by measurement, that the system meets the defined standard, and provides the evidence of it.
A generic clean does none of this, because it has no defined standard to measure against and typically does not measure or verify at all. It cleans the system and asserts it is clean, without measuring the grease deposit or providing verified evidence that any standard was met. So the difference in verification is stark: TR19 measures the result against a benchmark and documents the proof; a generic clean leaves you with a clean-looking system and an assertion. One gives you verified, evidenced compliance; the other gives you a clean and a claim. That is the core of what separates them.
Why it matters
The reason this difference matters comes back to what the extract cleaning is for and what you need from it. Kitchen extract cleaning is about controlling fire risk, and the compliance requirements around it - from insurers, fire risk assessors and the recognised standard itself - are about the system being cleaned to a proper standard and proven to be. A TR19 clean, measured and verified, gives you exactly that: compliance to a recognised standard with the evidence to demonstrate it. A generic clean, however clean-looking, does not, because it neither cleans to the recognised standard nor proves it.
So choosing a generic clean over a TR19 one is not simply choosing a cheaper route to the same outcome - it is choosing a clean-looking system without the verified compliance, which can leave you exposed exactly where the standard and the evidence matter, such as an insurance claim or a fire risk assessment. The appearance may be similar, but the compliance and the evidence are not, and those are what you actually need from an extract clean. The difference between TR19 and generic is the difference between proven compliance and a clean that only looks the part - which is why it matters far more than the appearance suggests.
The takeaway
A generic duct clean and a BESA TR19 clean can both leave the ductwork looking clean, which makes them seem similar - but the real difference is not appearance or effort. It is that TR19 cleans to a recognised, measurable standard, measures the grease deposit against that standard to verify the result, and documents it with photographs and readings; a generic clean cleans to the provider's own undefined judgement and typically neither measures nor proves anything.
So TR19 gives you verified, evidenced compliance to a defined benchmark, while a generic clean gives you a clean-looking system and an assertion. That difference matters because extract cleaning is about fire-risk compliance, and what you need is the system proven clean to a proper standard with the evidence to show it - which a generic clean, however clean-looking, does not provide. The difference between TR19 and generic is measurement, verification and evidence: proven to a standard, not just clean to the eye.
Questions
TR19 cleans to a recognised, measurable standard, measures the grease deposit against it to verify the result, and documents it with photographs and readings. A generic clean cleans to the provider's own undefined judgement and typically neither measures nor proves anything - so one gives verified compliance, the other a clean look.
They can both leave it looking clean, which is what makes them seem similar. But a clean-looking duct does not tell you it meets a recognised standard or that anyone measured whether it does - which is exactly where the real difference between TR19 and generic lies.
BESA TR19 Grease defines what an acceptably clean kitchen extract system is, in measurable terms - setting out the grease-deposit limits in microns that the system must meet. So a TR19 clean has an objective, defined benchmark, where a generic clean cleans to an undefined one.
By measuring the grease deposit against the standard's limits - typically with a Deposit Thickness Test - to confirm the system is below the compliant threshold after cleaning, and documenting it with before-and-after photographs and the measured readings. It proves compliance, rather than asserting it.
Because extract cleaning is about fire-risk compliance, and insurers, fire risk assessors and the standard require the system cleaned to a proper standard and proven to be. TR19 gives you that verified compliance with evidence; a generic clean, however clean-looking, does not.
No - it is a clean-looking system without the verified compliance, which can leave you exposed where the standard and evidence matter, such as an insurance claim or fire risk assessment. The appearance may be similar, but the compliance and evidence are not.
We clean to the BESA TR19 Grease standard and verify the result - measuring the grease deposit and documenting it with photographs and readings, so you get proven compliance.
