What is TR19®? Grease cleaning requirements explained
The BESA specification behind compliant kitchen extract cleaning — who's responsible, how often you must clean, and the certificate your insurer expects.
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Ventilation Hygiene & Compliance Guides
Plain-English guidance on the standards that govern commercial ventilation hygiene in the UK. Whether you run a busy kitchen, manage a portfolio of buildings or look after fire safety for your organisation, these guides explain what the rules actually mean — and what you need to do to stay compliant.
Ventilation compliance can feel like an alphabet soup of standards: TR19®, BS 9999, BS EN 15780, DW/145 and the Regulatory Reform (Fire Safety) Order 2005. Get it wrong and you risk fire, failed audits, enforcement action from your local Environmental Health Officer (EHO) and — critically — invalidated building insurance. Get it right and you have a clear paper trail that satisfies insurers, fire officers and auditors alike.
Each guide below is written by a working ventilation hygiene team, not a marketing department. We cover kitchen extract grease cleaning, how often systems must be cleaned, fire damper drop testing and the latest changes to the TR19® Air standard. Start with whichever is most relevant to your building, and follow the internal links to dig deeper.
Fire damper testing requirements: BS 9999 explained
How often fire dampers must be drop tested, the step-by-step test procedure, and the records you must keep to avoid penalties.
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The TR19® frequency table explained with real-world examples — plus what happens if you skip it.
Read guideTR19® Air Version 2 (2026): what's changed
An authority breakdown of the 2026 update — VHR integration, Section 9 reporting, Deposit Thickness Tests and BS EN 15780:2025.
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