Why this matters right now (and why it keeps catching kitchens out)
In UK commercial kitchens, extract hygiene is one of those “out of sight, out of mind” duties—until a service disruption, an insurer query, or an engineer visit makes it urgent. In 2026, the recurring problem we keep seeing is not a lack of intent; it’s a lack of a workable, written plan that links (1) your cooking reality (hours, menu, peak loading), (2) extract cleaning frequency and evidence, and (3) day-to-day checks your team can actually keep up with.
Industry guidance around duct cleanliness and kitchen extract fire risk management is widely referenced in procurement, landlord requirements and insurance loss-prevention expectations. BESA’s TR19® Grease is positioned as industry best practice for managing grease accumulation risks in commercial kitchen extraction systems, and BESA continues to publish operator-facing updates and explainers (including January 2026 guidance aimed at compliance and fire risk management). (thebesa.com)
Separately, HSE’s catering and hospitality gas safety guidance underlines that gas appliances, flues, pipework and safety devices must be maintained in a safe condition and that catering operators need robust maintenance arrangements. (hse.gov.uk)
What TR19® Grease is (and what it isn’t) in practical operator terms
TR19® Grease is a specification focused on fire risk management relating to grease accumulation in kitchen extraction systems. It is not, in itself, a piece of legislation—but it is widely used as a benchmark for demonstrating that you’re managing a well-known risk using recognised industry practice. (publications.thebesa.com)
For operators, the most useful way to think about TR19® Grease is as a system for answering three questions with evidence: (1) how often should we clean, given our usage; (2) what exactly was cleaned (canopy, filters, ductwork, fan, discharge); and (3) what condition is it in now (post-clean report and photos/measurements where provided). (thebesa.com)
TR19® Air and TR19® Grease are related but distinct. TR19® Air is associated with ventilation hygiene and indoor air quality; TR19® Grease is specifically about grease-related fire risk in kitchen extract. BESA’s own explainers highlight the separation and the different focus areas. (thebesa.com)
How dirty extraction turns into operational risk (without being alarmist)
Operators usually notice extract issues through symptoms, not ductwork: hotter kitchens, lingering cooking odours, excessive smoke spillage, greasy surfaces returning quickly after cleaning, or staff complaints about comfort. While these symptoms don’t diagnose the cause, they are a strong prompt to review (a) filter cleaning discipline, (b) whether fan performance has drifted, and (c) whether ductwork and the fan have accumulated grease beyond what your current cleaning cycle can control.
From a gas-safety perspective, your extraction and airflow environment matters because gas-fired cooking in commercial settings relies on safe combustion and removal of products of combustion. HSE’s catering gas safety guidance emphasises safe use and maintenance of gas-fired equipment and associated safety devices. (hse.gov.uk)
From a business continuity perspective, the most common pain point is avoidable downtime: discovering you need an urgent clean (or documentation) right before an inspection, handover, refurbishment sign-off, or a landlord/insurer audit. The fix is almost always “simple but not quick”: you need the right contractor availability, access arrangements, and an evidence trail. (thebesa.com)
A simple 6-step extract cleaning plan you can implement this week
This is an operator plan—not a duct-cleaning method statement. It’s designed to help you schedule, brief contractors, and keep records without drifting into DIY gas work or unsafe practices.
Step 1 — Map your system and access points (30–60 minutes). Create a one-page map showing: hood/canopy location(s), filter type, duct route (as far as you know), fan location, discharge point, any access panels, and who controls access (you, landlord, centre management). Add photos taken on a phone. Your goal is to prevent “we couldn’t access it” surprises on the day.
Step 2 — Classify your kitchen usage realistically. Don’t understate your usage to get a longer cleaning interval—because the ‘true’ interval is the one that keeps grease under control and satisfies your stakeholders. Note: daily operating hours, days per week, and whether you run high-grease/high-smoke cooking (e.g., chargrilling, frying) most services.
Step 3 — Set a cleaning cycle and lock in diary dates. Use TR19® Grease-informed frequency guidance as a starting point, then adjust for your actual reality (seasonal peaks, Christmas menu, festival season, late-night trading). BESA’s operator guidance emphasises cleaning frequency based on usage and risk factors. (thebesa.com)
Step 4 — Decide what evidence you will keep every time. As a minimum, aim for: contractor job sheet/invoice with scope, pre/post photos, areas cleaned (canopy, filters, ductwork, fan, discharge), date/time, and any ‘limitations’ noted (e.g., inaccessible riser). If your insurer/landlord specifies a format, follow that. BESA highlights the importance of a documented approach and using appropriately trained specialists. (thebesa.com)
Step 5 — Build a weekly “extract hygiene” routine your team can actually follow
A schedule only works if the basics are consistent. A practical weekly routine (non-technical and safe) might include:
• Filters: confirm your filter cleaning frequency is being met; record it on a simple log. (Your cleaning contractor can advise what ‘normal’ looks like for your cooking profile.)
• Canopy surfaces: check for visible grease build-up or drips; escalate early rather than waiting for a deep clean.
• Fan and noise: note unusual noise/vibration or obvious performance changes and report promptly to your maintenance provider. Don’t open electrical panels or attempt repairs.
• Housekeeping: ensure cooking line isn’t blocking hood capture; keep combustible packaging and oil containers stored appropriately away from heat sources (general fire risk good practice).
Step 6 — Tie extraction hygiene to your gas interlock, ventilation and engineer visits
Many kitchens have gas safety interlocks linked to ventilation provision. Interlock design and application in catering settings is covered in industry standards produced by IGEM with Gas Safe Register involvement, and is used to support how interlocks are applied alongside ventilation in commercial catering installations. (igem.org.uk)
Two operator actions reduce last-minute problems:
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Keep interlock and ventilation testing/maintenance dates visible in the same compliance calendar as your extract cleaning. This prevents ‘passing’ one part of the system while another is overdue.
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When you book any gas-safety related engineer visit, provide your last extract clean report (and note any known access limitations) so the engineer can plan appropriately. This is not about guaranteeing an outcome; it’s about enabling an efficient, well-informed visit.
Choosing a contractor: what to ask for (without overcomplicating it)
Procurement doesn’t have to be bureaucratic, but it does need to be consistent. BESA’s own guidance suggests confirming technicians’ competence (including relevant training/qualifications for grease hygiene work) and using specialists where kitchen extract grease removal is required. (thebesa.com)
When requesting a quote, ask these practical questions:
• Scope: Does the price cover canopy, filters, ductwork, fan, and discharge? If not, what’s excluded?
• Access: What access panels exist now, and are more required? (If modifications are needed, use suitable competent contractors; do not improvise.)
• Evidence: What report/photos will you receive, and how quickly after the clean? Can it be provided in a format that suits your landlord/insurer? (thebesa.com)
Documentation checklist (the ‘audit file’ you want ready in 5 minutes)
Keep a single folder (digital or paper) named “Kitchen Extract – Grease Hygiene”. Include:
• System map + photos (updated after refurb/line changes)
• Cleaning schedule (12 months forward)
• Last 2–3 cleaning reports with before/after evidence
• Any remedial actions raised and when they were closed out (e.g., access improvements, fan service) — handled by competent contractors, not DIY fixes