Restaurant Fire Safety: Kitchens, Extraction & Suppression

Running a commercial kitchen comes with unique fire risks. With open flames, high temperatures, deep-fat fryers, and fast-paced service, restaurants face a far greater danger of fire than most workplaces. Under the Regulatory Reform (Fire Safety) Order 2005 (RRO), the responsible person—usually the owner, manager, or landlord—must carry out and regularly review a suitable and sufficient fire risk assessment. This article offers practical guidance on managing kitchen hazards, extraction systems, and suppression methods to help you stay compliant and protect your staff and premises.

Understanding the Regulatory Framework

As a business owner, you have a legal duty to manage fire safety. The RRO 2005 places the onus on the responsible person to identify fire hazards, evaluate risks, and implement reasonable control measures. Additionally, the Health and Safety at Work etc Act 1974 (HSWA) and the Management of Health and Safety at Work Regulations 1999 (MHSWR) require you to manage health and safety risks to employees and others affected by your work.

To demonstrate compliance, many businesses rely on PAS 79, the British Standard code of practice for fire risk assessments. This framework provides a structured methodology for documenting hazards and safety measures. Because commercial kitchens are complex environments, following recognised guidance is essential. If you are unsure whether your current arrangements meet these standards, we recommend arranging a HawkSwift assessment to review your premises.

Identifying Kitchen Fire Hazards

The first step in any fire risk assessment is identifying hazards. In a restaurant kitchen, the primary sources of ignition include:

• Cooking equipment: Deep-fat fryers, griddles, and gas hobs.
• Electrical faults: Frayed wiring on commercial appliances or overloaded sockets.
• Hot surfaces and oils: Flashpoint ignition of cooking oils and grease build-up.
• Poor housekeeping: Accumulation of combustible materials like cardboard, paper towels, and packaging near heat sources.

Effective control measures include keeping cooking surfaces clean, enforcing strict housekeeping routines, and ensuring a safe distance between portable electrical equipment and deep-fat fryers. Staff training is also vital; every employee should know how to safely isolate fuel sources and use a fire blanket.

The Role of Extraction Systems

Extraction systems are critical for removing heat, smoke, and grease-laden vapours from the kitchen. However, they are also a leading cause of commercial kitchen fires when poorly maintained. Grease deposits inside ductwork can ignite easily, allowing a fire to spread rapidly through the building.

To mitigate this risk, extraction systems must be regularly inspected and cleaned by a competent person. The frequency of cleaning depends on the volume and type of cooking:

• Heavy use (12–16 hours per day): Deep clean every 3 months.
• Moderate use (6–12 hours per day): Deep clean every 6 months.
• Light use (1–6 hours per day): Deep clean every 12 months.

These timeframes align with industry guidance such as the TR19® Grease standard for kitchen extraction systems. You should maintain a cleaning logbook on-site as evidence for fire safety inspectors and your insurance provider.

Fixed Fire Suppression Systems

Given the high risk of deep-fat fryer fires, many commercial kitchens require fixed fire suppression systems. These systems are designed to detect heat and discharge a wet chemical agent that cools the burning oil and forms a blanket to prevent re-ignition.

If your kitchen operates deep-fat fryers or high-output cooking equipment, a fixed suppression system is strongly recommended. These systems must be installed and maintained according to the relevant British Standards by competent engineers. Routine servicing—typically every six months—ensures the system remains functional and compliant.

It is important to note that standard fire extinguishers are not a substitute for a fixed suppression system. However, portable equipment remains a necessary backup.

Fire Extinguishers and Detection

Providing the right fire extinguishers is a legal requirement under the RRO. In a commercial kitchen, you must provide:

• Class F wet chemical extinguishers: Essential for deep-fat fryer fires. Using the wrong extinguisher on a cooking oil fire can cause violent splashing and spread the fire.
• CO2 extinguishers: Suitable for electrical fires involving appliances.
• Fire blankets: Useful for smothering small pan fires or wrapping around a person whose clothing has ignited.

Detection systems must also be tailored to the kitchen environment. Standard smoke detectors are unsuitable for commercial kitchens because normal cooking operations will cause false alarms. Instead, heat detectors should be installed in the kitchen area, while smoke detectors should be placed in dining areas, corridors, and storage rooms. All detection and warning systems must be maintained in good working order.

Staff Training and Emergency Planning

Even the best equipment is ineffective if staff do not know how to respond. Under the RRO, you must provide adequate fire safety training for all employees. This training should cover:

1. Identifying fire hazards in the kitchen. 2. Safe use of cooking equipment and isolation procedures. 3. Correct selection and use of fire extinguishers and blankets. 4. Evacuation routes and assembly points. 5. Reporting faults or damaged equipment.

Training must be repeated periodically and documented. New staff should receive induction training before working their first shift. Your emergency plan must also account for the safe evacuation of customers, including those with disabilities.

How HawkSwift Can Help

Managing fire safety in a restaurant requires specialist knowledge of both legal duties and practical kitchen operations. At HawkSwift Ltd, our NEBOSH-qualified assessors provide thorough, PAS 79-aligned fire risk assessments starting from £199 + VAT, with 48-hour reports to help you act quickly on any findings. To ensure your restaurant meets UK fire safety standards, book a fire risk assessment with our team today.