If you manage or operate a commercial kitchen in the UK, maintaining a safe, compliant, and hygienic environment is a top priority. One of the most overlooked, but most critical areas of compliance is your kitchen extraction system.

Grease-laden extract systems are one of the biggest fire risks in commercial kitchens, and in many cases, they’re hidden in plain sight.

That’s where TR19 kitchen cleaning comes in.

This post explains everything you need to know about TR19, including what it covers, how it supports compliance, and why regular commercial kitchen extract cleaning is essential for your business.

What Is TR19?

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TR19 is a technical standard developed by the Building Engineering Services Association (BESA). Originally introduced as best practice guidance for ductwork cleanliness in general ventilation systems, TR19 has since evolved to include a specific section for kitchen environments.

The current version, TR19® Grease, was introduced in 2019. It sets out a code of practice for cleaning kitchen extract systems, providing a framework for what should be cleaned, how frequently, how it should be documented, and what evidence is required to prove compliance.

It’s not a legal requirement in itself - but it is the accepted standard referenced by:

•   Insurance companies
•   Fire safety inspectors
•   Environmental health officers
•   Commercial landlords and facilities management teams

Failure to comply with TR19 often leads to failed inspections, higher insurance premiums, or even voided insurance claims after a fire.

Why Kitchen Extract Cleaning Matters

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Your kitchen’s extraction system is designed to remove steam, smoke, heat, and airborne grease during cooking. But over time, grease particles build up inside the ductwork, canopy, filters, and extractor fans.

This creates several major risks:

Fire Hazard: Grease is highly flammable. If ignited by a flame or spark, it can cause a fast-spreading duct fire.

Poor Hygiene: Grease buildup can lead to foul odours, bacterial growth, and pest infestations.

Reduced Performance: Blocked ducts reduce airflow, making the kitchen hotter, smokier, and less safe for staff.

Regulatory Risk: Failing an EHO or fire inspection can result in fines or even temporary closure.

According to industry statistics, more than 70% of commercial kitchen fires originate in extraction systems. Regular cleaning isn’t just a box-ticking exercise - it’s a vital safety requirement.

What’s Involved in TR19 Kitchen Cleaning?

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A TR19-compliant clean goes far beyond wiping down visible surfaces.

It includes:

1. Site Survey and Risk Assessment

• A certified provider inspects your extraction system layout.
• Identifies access points, hidden ducting, fans, and fire dampers.
• Notes usage levels to determine required cleaning frequency.

2. Mechanical Cleaning

• Thorough degreasing of canopy, baffle filters, and all accessible ductwork.
• Internal scraping of duct walls and fans.
• Use of steam cleaning or wet washing techniques to remove stubborn grease deposits.

3. Testing and Verification

• Technicians measure grease thickness levels (wet film thickness test).
• High-risk areas are re-cleaned until they meet TR19 pass criteria.
• Photos are taken before and after cleaning.

4. Certification and Reporting

• A TR19 certificate is issued to confirm compliance.

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A TR19 certificate is issued to confirm compliance.

Detailed report includes:

•   Areas cleaned
•   Grease measurement data
•   Photographic evidence
•   Next due date

Many providers also offer a digital logbook for audit readiness.

TR19 isn’t just about cleaning - it’s about proving you've done it right.

How Often Do You Need TR19 Cleaning?

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Frequency is based on how many hours per day your kitchen operates:

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These frequencies align with TR19 recommendations and insurance industry expectations. If you're unsure of your category, a site survey can determine your level of risk.

Important: Insurers often require proof of TR19-compliant cleaning at the correct intervals. Failure to comply can invalidate your cover in the event of a fire.

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Planning around service

It is key to create a simple and repeatable plan:

• Book cleans outside core trading hours, typically overnight or early morning.
• Combine TR19 with canopy filter swaps and quick fan checks to avoid repeat access.
• Sequence multi-site visits so reports land together for audits.
• Hold spare baffle filters so you can rotate clean sets instantly after the visit.
• Schedule pre-peak cleans ahead of bank holidays, school breaks and event seasons.

The most effective way to plan around your business is to integrate TR19 with catering and HVAC tasks. For example, align extract cleaning with commercial kitchen appliance repair checks or a seasonal air handling review. Coordinated visits reduce disruption and help you maintain a single compliance calendar across sites.

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What Happens If You Don’t Comply?

The consequences of neglecting kitchen duct cleaning compliance can be severe:

•   Increased Fire Risk: Grease fires spread rapidly through contaminated ductwork.
•   Insurance Refusal: Insurers may decline to pay out if there's no valid TR19 certificate.
•   Enforcement Action: Local authority inspections can result in fines or closure orders.
•   Reputation Damage: A hygiene-related shutdown or fire event can seriously damage your brand.

In short, non-compliance is a liability, not just a cleaning issue.

TR19 and Your Legal Duties

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Under the Regulatory Reform (Fire Safety) Order 2005, commercial kitchens have a legal duty to mitigate fire risk. That includes keeping extract systems clean and free of flammable materials.

TR19 offers the benchmark for showing that these responsibilities are being met.

Why Use a Certified TR19 Cleaning Provider?

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Choosing the right provider is essential. Many duct cleaners claim compliance but don’t meet the full requirements.

A certified TR19 contractor will:

•   Use BESA-approved methods
•   Provide a full post-clean report and certificate
•   Ensure access panels are sufficient for a full clean
•   Advise on ongoing compliance and scheduling

At First in Service, we are TR19-compliant specialists with experience supporting commercial kitchens in:

•   Hospitality (pubs, restaurants, hotels)
•   Education (school kitchens, university canteens)
•   Healthcare, retail, and public sector environments

We also work flexibly to minimise disruption - offering overnight and weekend cleans where needed.

TR19 kitchen extract cleaning is not just a recommendation - it’s essential for fire safety, insurance, legal compliance, and the health of your staff and customers.

If your kitchen runs long hours, produces greasy food, or hasn’t been cleaned in over 6 months, it’s time to act.

Don’t wait for a fire, a failed inspection, or an insurance dispute - contact First in Service today and protect your kitchen, your staff, and your reputation.

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FAQ's

• What is the TR19 cleaning standard?

It is the recognised UK guidance for cleaning and documenting kitchen extract systems, using measured grease thickness, photographic evidence and scheduled intervals set by risk and usage.

• How often should TR19 be cleaned?

High-use systems often need cleaning every 1 to 3 months, medium use every 3 to 6 months, and low use every 6 to 12 months. Set your interval using measured residues and review each visit.

• Is duct cleaning a legal requirement?

TR19 itself is guidance, but employers must manage fire risk and insurers expect compliant evidence. Following TR19 is the accepted route to demonstrate control.

• How long do vent cleanings take?

From a few hours for simple systems to overnight for typical restaurants. Complex, long or neglected systems can take longer or require phased work.

• What are signs I need extract and duct cleaning?

Grease odours, visible deposits, poor capture, fan noise or vibration, grease drips, overdue intervals, or a request from insurers or auditors.

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