What Is TR19?
TR19 is the technical reference document published by the Building Engineering Services Association (BESA) that sets the standard for the inspection, cleaning, and maintenance of kitchen extract ventilation systems in the UK. The document — formally titled Guide to Good Practice: Internal Cleanliness of Ventilation Systems — defines the methodology, frequency, and documentation requirements for commercial kitchen extract cleaning.
For UK business owners operating commercial kitchens, TR19 compliance is not merely best practice. It is a contractual requirement embedded in most commercial property insurance policies, and failure to comply can result in a claim being declined or a policy being voided in the event of a fire.
Why TR19 Exists
Commercial kitchen extraction systems accumulate grease deposits over time. These deposits are highly flammable and, without regular cleaning, represent a significant fire risk. According to the Fire Protection Association, commercial kitchen fires account for a disproportionate number of serious commercial property fires in the UK each year, with grease buildup in extraction systems identified as a primary cause.
The TR19 standard was developed to address this risk by establishing a consistent, measurable benchmark for extraction system cleanliness. It specifies acceptable grease deposit thicknesses, cleaning methodologies, and the documentation that must be produced following a compliant clean.
What Does a TR19 Clean Include?
A TR19-compliant kitchen extract clean covers the entire extraction system from the cooking equipment to the point of discharge. This includes:
- Canopy hoods — the visible hood above cooking equipment, including all internal surfaces
- Baffle filters — the grease-capture filters within the canopy
- Ductwork — all internal duct surfaces from the canopy to the fan
- Risers — vertical duct sections, which are particularly prone to grease accumulation
- Extract fans — the fan unit itself, including blades, housing, and motor casing
- Grease traps and collection points — any grease collection devices within the system
Following the clean, a TR19-compliant service report must be produced. This report includes photographic evidence of the system before and after cleaning, deposit thickness measurements, and a formal compliance certificate confirming the system meets the TR19 standard.
How Often Does a Commercial Kitchen Extraction System Need Cleaning?
The TR19 standard specifies cleaning frequencies based on the intensity of use of the cooking equipment. The standard categories are:
| Usage Level | Typical Premises | Minimum Cleaning Frequency | |---|---|---| | Heavy use | Fast food restaurants, fish and chip shops, high-volume caterers | Every 3 months | | Moderate use | Restaurants, hotels, pubs, schools | Every 6 months | | Light use | Offices, care homes, low-volume caterers | Every 12 months |
These are minimum frequencies. Your insurer may specify more frequent cleaning as a policy condition, particularly if your premises have a history of claims or if your cooking processes involve high-fat or high-volume cooking.
What Happens If You Don't Have TR19 Compliance?
The consequences of non-compliance fall into three categories.
Insurance: Most commercial property and business interruption policies contain a condition requiring the policyholder to maintain the premises in a safe condition and comply with relevant standards. A TR19 compliance certificate is the accepted evidence of compliance for kitchen extraction systems. Without it, an insurer may decline a fire claim on the grounds that the policyholder failed to maintain the system in accordance with the policy conditions.
Regulatory: Environmental Health Officers (EHOs) and fire officers have the authority to inspect commercial kitchen extraction systems. A system that fails to meet TR19 standards can result in an improvement notice, a prohibition notice, or in serious cases, prosecution under the Regulatory Reform (Fire Safety) Order 2005.
Operational: A grease-laden extraction system is less efficient, draws more energy, and creates an unpleasant working environment. Regular TR19 cleaning maintains system performance and extends equipment life.
Why Choose a CII-Qualified TR19 Specialist?
Not all extraction cleaning companies understand the insurance implications of their work. At BlueTick Extraction Hygiene, our founder holds CII (Chartered Insurance Institute) qualifications and works alongside an FCA-regulated commercial insurance brokerage. This means we understand exactly what your insurer's underwriters require from a TR19 compliance report — and every document we produce is written to meet that standard.
We serve commercial kitchens across Peterborough, Cambridgeshire, Northamptonshire, Lincolnshire, and the surrounding counties. To book a free, no-obligation site survey, call 07423 291372 or visit bluetickhygiene.co.uk.
Related reading: How Often Should a Commercial Kitchen Extraction System Be Cleaned? | What Does a TR19 Compliance Certificate Include?