TR19 Grease & Commercial Kitchen Extract Cleaning: What Operators Need to Know

Grease build-up is an unavoidable part of operating a commercial kitchen.

As cooking takes place, grease, oil vapours and other airborne contaminants are drawn into the kitchen extraction system. While filters capture some of this, grease can travel further into the ductwork and accumulate on internal surfaces.

Without appropriate inspection, maintenance and cleaning, these deposits can increase fire risk and affect the performance of the extraction system.

That's where TR19 kitchen extract cleaning comes in.

TR19® Grease provides industry best-practice guidance for managing grease accumulation within commercial kitchen extraction systems, helping operators understand how their systems should be inspected, cleaned and maintained.

What is TR19 Grease?

TR19® Grease is a specification produced by the Building Engineering Services Association (BESA) specifically for the fire risk management of grease accumulation within kitchen extraction systems.

It covers areas including the inspection, cleaning and ongoing management of grease within commercial kitchen extract systems.

For operators, facilities managers and building owners, following an appropriate cleaning and maintenance regime can help support TR19 compliance, fire-risk management and the safe operation of kitchen extraction systems.

Why does kitchen extract ductwork need cleaning?

Grease doesn't stop at the filters. Grease-laden vapours produced during cooking can travel through the extraction system before cooling and settling on internal surfaces.

Over time, deposits can accumulate within:

• Canopies

• Filters

• Ductwork

• Fans

• Other components within the extract system

This is particularly important in areas of ductwork that are difficult to access or inspect.

Grease deposits are combustible, which means allowing them to accumulate can increase the potential fire load within a kitchen extraction system.

Regular inspection and TR19 kitchen extract cleaning therefore form an important part of managing this risk.

How often should TR19 cleaning be performed?

There isn't one cleaning frequency that's suitable for every commercial kitchen.

The appropriate schedule depends on factors including how heavily the kitchen is used, the type of cooking taking place and the rate at which grease accumulates.

TR19® Grease provides recommended minimum cleaning frequencies based on kitchen usage.

As a general guide:

• Heavy use – 12–16 hours per day: every 3 months

• Moderate use – 6–12 hours per day: every 6 months

• Light use – 2–6 hours per day: every 12 months

However, these are baseline recommendations rather than a replacement for assessing the actual condition and risk of an individual system. A kitchen producing high levels of grease may require more frequent inspection or cleaning.

What does TR19 compliance involve?

TR19 compliance isn't just about booking a duct clean at set intervals.

Effective grease management also involves understanding the condition of the extraction system, ensuring appropriate access is available and being able to demonstrate that cleaning has been completed to the required standard.

Inspection and cleaning should consider the complete extract system rather than only the visible areas around the canopy.

This is particularly important because grease accumulation can occur deeper within ductwork, where it may not be immediately obvious to kitchen staff.

Why is access to kitchen extract ductwork important?

You can't properly inspect or clean areas you can't reach. Commercial kitchen extract ductwork can run through ceilings, risers, roof spaces and other difficult-to-access parts of a building.

If sections of the system aren't accessible, grease deposits can remain even when the more visible parts of the extraction system have been cleaned.

Good system design and maintenance therefore need to consider access for ongoing inspection and cleaning, rather than treating it as an afterthought.

Can grease build-up be reduced between cleans?

Cleaning is an important part of commercial kitchen extract maintenance, but operators can also look at how grease is managed between cleaning intervals.

Grease management technologies can help reduce the accumulation of grease within kitchen extract ductwork.

Quintex’s Ecofix provides continuous grease management by introducing biologically active droplets into the extract system. These adhere to grease, oils and fats on internal duct surfaces, where selected bacteria consume the grease and volatile fatty acids. The process converts the grease into water, CO₂ and a minimal biomass residue.

By continuously managing grease within the ductwork, Ecofix can help reduce grease accumulation and support the ongoing management of commercial kitchen extract systems.

TR19 cleaning and grease management should work together

TR19 kitchen extract cleaning shouldn't be viewed in isolation.

A good grease-management strategy considers what is happening inside the extraction system throughout its operation, not just when the next clean is due.

That means considering:

• How quickly grease is accumulating

• Whether all areas of the ductwork can be accessed

• Inspection and cleaning requirements

• Fire risk

• System performance

• Ongoing grease management

• Appropriate records and verification

For kitchens with high cooking loads, difficult-to-access ductwork or persistent grease accumulation, reducing the amount of grease building up between cleans can form an important part of the wider maintenance strategy.

Managing grease in your commercial kitchen extraction system

Every commercial kitchen is different. Cooking methods, operating hours, extraction design and ductwork layout can all affect how quickly grease accumulates and how the system needs to be managed.

Regular inspection and appropriate cleaning remain essential, while technologies such as Ecofix can provide an additional way of continuously managing grease within the extract system.

If you're reviewing grease accumulation within your kitchen extraction system, find out how Ecofix commercial kitchen grease management works or speak to the Quintex team about your system.

TR19 Kitchen Extract Cleaning FAQs

What is TR19 extraction cleaning?

TR19 extraction cleaning refers to the inspection and cleaning of kitchen extraction systems in line with BESA's TR19® Grease specification. It focuses on managing grease accumulation within components such as canopies, ductwork and fans to help reduce fire risk.

What is the TR19 standard?

TR19® is industry guidance produced by BESA for the cleanliness of ventilation systems. For commercial kitchen extraction, TR19® Grease is the relevant specification and focuses specifically on managing the fire risk associated with grease accumulation.

Is TR19 a legal requirement?

TR19® is not itself legislation. However, commercial kitchen operators have legal responsibilities around fire safety and risk management, and TR19® Grease provides a recognised industry framework for managing grease accumulation within kitchen extraction systems.

What happens if TR19 guidance is not followed?

Not following TR19 guidance increases the fire risk and the level of scrutiny from insures following a fire.

How often should TR19 cleaning be performed?

BESA guidance recommends minimum cleaning frequencies based on kitchen usage. As a general guide, systems serving kitchens in heavy use for 12–16 hours per day should be cleaned every three months, moderate use of 6–12 hours per day every six months, and light use of 2–6 hours per day every 12 months. The appropriate frequency can vary depending on cooking type, grease accumulation and risk.

Where can I find the TR19 regulations in PDF format?

TR19® Grease is a specification rather than a set of regulations. The official TR19® Grease specification is published by BESA and is available in PDF format through BESA Publications.