TR19 is the industry-leading guidance document for the hygiene of ventilation systems in commercial kitchens, produced by BESA (Building Engineering Services Association). It sets out recommended cleaning frequencies, procedures and documentation standards for kitchen extract systems — and it has become the reference point used by insurers, fire authorities and environmental health officers across the UK.
Our quote service arranges enquiries for TR19-focused kitchen extract cleaning across Pembrokeshire and West Wales, connecting food businesses with specialist providers who understand the documentation, cleaning methods and scope required.
What does TR19-focused cleaning involve?
TR19 cleaning goes beyond a surface wipe. It requires a thorough clean of the full extract pathway — from the canopy and baffle filters through the ductwork to the fan and discharge point. TR19 guidance specifies the method, chemicals, personal protective equipment and record-keeping appropriate to different kitchen types.
Providers should issue a completion certificate or post-clean inspection report confirming the work carried out, grease thickness measurements where applicable, and the recommended next clean interval.
Why TR19 compliance matters for your business
Many commercial property insurers now specifically require TR19-compliant cleaning records as a condition of commercial kitchen cover. In the event of a fire, a kitchen without adequate cleaning documentation may face difficulties with insurance claims.
Environmental health officers and fire safety inspectors may also request evidence of a regular, documented cleaning schedule. Maintaining this documentation protects your business and demonstrates responsible management.
Cleaning frequencies under TR19 guidance
TR19 uses cooking volume to determine frequency: - Heavy use (fryers, solid fuel): quarterly cleaning - Moderate use: 6-monthly cleaning - Light use: annual cleaning
Specialist providers will assess your operation and advise accordingly.
NAAD21 and TR19
TR19 is complemented by NAAD21 (current version: NAAD-21:2025) — the kitchen extract cleaning verification standard published by NAADUK (National Association of Air Duct Specialists UK). Professional contractors now increasingly work to both standards simultaneously. NAAD21 adds a structured method of verification including wet film thickness measurement and photographic evidence requirements. Documentation referencing both standards provides the strongest possible compliance record for insurance and EHO purposes. See our dedicated [NAAD21 compliance guide](/naad21-compliance) for a full comparison of both standards.
For a comprehensive guide to what UK insurers require, what documentation to keep on file, and the legal framework behind extract system maintenance, see our [Kitchen Fire Insurance Compliance guide](/kitchen-fire-insurance-compliance).