How can I identify and mitigate fire hazards in your restaurant kitchen?
Why commercial kitchens are high risk and what the law expects
Commercial kitchens concentrate the three ingredients for fire: ignition sources, fuel and oxygen in a busy, hot environment. Open flames, deep fat fryers, hot grills and electrical equipment create many opportunities for fire to start. Grease build-up in hoods and ductwork can act as hidden fuel that spreads fire quickly.
The government expects responsible persons to carry out a suitable and sufficient fire risk assessment and to take reasonable steps to prevent fire and protect people. See the GOV.UK guide to making small non-domestic premises safe from fire for practical legal advice.
You must also manage workplace health and safety duties, including ventilation, equipment maintenance and safe handling of fuels and chemicals. The HSE catering guidance explains how poor extraction and blocked ductwork raise the risk of fire and carbon monoxide exposure.
How to identify and mitigate fire hazards in your restaurant kitchen
Start with a focused walk-round. Use a simple checklist and look for the three elements that cause fire: sources of ignition, combustible fuel and oxygen. Inspect, record and act on anything significant that could cause harm.
Sources of ignition: open flames, grills, fryers, poorly maintained electricals and chargers, exposed wiring, space heaters and faulty appliances.
Fuel sources: cooking oils and fats, cloths, cardboard, packaging, waste and grease in hoods and ducts.
Oxygen and spread routes: poor compartmentation, open kitchen layouts, blocked escape routes, and vertical ductwork that links kitchen and other floors.
Record and prioritise. Rate each item for urgency. Immediately isolate or remove anything that presents a clear and present danger. Then plan repairs and longer-term controls.
Inspecting extraction, hoods and ductwork — single most important step
Grease in extraction systems is a primary cause of commercial kitchen fires. Regular cleaning and verified checks are essential. Industry best practice is the TR19 standard for grease management and vent hygiene; following TR19 gives measurable verification that ductwork and hoods meet accepted cleanliness standards. Many insurers and local fire services now expect TR19-compliant cleaning records. See the BESA vent hygiene register and TR19 guidance.
Practical checks and documented verification of vent hygiene are often the difference between an accepted insurance claim and refusal — keep the records.
Practical checks for managers — check these daily and record findings.
Check hood filters daily: clean or replace when clogged.
Inspect visible ductwork: look for oil trails, black deposits or dripping.
Log extraction fan operation: note unusual noises or smoke.
Engage a certified vent hygiene contractor: ask for TR19 cleaning and post-clean verification such as a VHE or BESCA certificate. Read more at the BESCA vent hygiene scheme announcement.
Fixed suppression, portable extinguishers and firefighting strategy
Fixed wet chemical suppression systems are common over fryers and cooking ranges in large or busy kitchens. These systems deploy automatically or manually and work with the extraction canopy to control cooking oil and fat fires. Your fire risk assessment should confirm whether fixed suppression is needed for your operation. See the GOV.UK guide for details.
Portable fire equipment: maintain the correct portable extinguishers and a fire blanket near fryers. Train staff to use equipment safely and to know when not to fight a fire — never use water on a deep fat or cooking oil fire.
Service records: keep records of service and maintenance for suppression systems and extinguishers. Typical inspection intervals are annual for extinguishers and as the manufacturer prescribes for suppression systems. Further guidance is available from Total Safe on kitchen suppression.
Electrical and gas safety — reduce ignition risks
Control faulty appliances and poor electrical practice. Ensure that all cooking appliances are maintained and serviced by competent engineers and that Portable Appliance Testing (PAT) is carried out where appropriate.
Prevent overloads and uncontrolled charging: electrical sockets must not be overloaded; control charging of phones and tablets.
Gas safety: gas appliances should be serviced per manufacturer guidance and inspected annually by a Gas Safe registered engineer.
Solid fuel appliances: if you use wood-fired ovens or other solid fuels, follow HSE and local authority guidance for ventilation and carbon monoxide controls. Fit appropriate CO monitoring and check flues and extraction frequently. See HSE guidance on solid fuel and CO.
Housekeeping, storage and waste — simple controls that cut risk
Good housekeeping reduces fuel and prevents small fires from becoming major incidents. Put these measures into daily practice and record checks.
Remove combustible waste promptly: clear packaging and store it away from cooking areas.
Store stock and chemicals safely: keep them in labelled, ventilated stores away from heat sources.
Use appropriate bins for hot ash: metal bins for ash or coals; position external waste away from the building fabric.
Avoid storing spare cooking oil near heat or electrical panels.
Train staff: ensure spillages and combustible clutter are cleared immediately and use daily/weekly checklists to maintain standards on busy service days.
Detection, alarms and safe escape — think beyond the kitchen
Use heat or rate-of-rise detectors in kitchens rather than smoke alarms to reduce nuisance alarms while still providing reliable warning. The NFCC guidance supports heat detection in cooking areas.
Ensure escape routes remain clear: exits should be well signed and regularly checked during service. If the kitchen sits below dining areas or residential flats, consider vertical spread via ducts or risers and take steps to compartmentalise and protect that route.
Staff training and competence — prevention and response
People are a key control. Train staff to follow cleaning schedules for hoods and filters, to use fire blankets and the correct type of extinguisher, to isolate gas and electrical supplies safely when needed, and to evacuate quickly and account for customers.
Regular drills and role-specific training: carry out short, frequent drills and record attendance. Appoint and train nominated fire marshals to lead evacuations and check shut-down procedures.
If you prefer external trainers, Total Safe can deliver practical fire marshal and extinguisher training tailored to busy kitchens. See Fire safety services from Total Safe for options.
Maintenance, record keeping and proving compliance
Good records prove you have taken reasonable steps. Keep the following and ensure they are readily available:
Fire risk assessments and action plans
Servicing records for suppression systems and extinguishers
TR19 cleaning certificates and post-clean verification
PAT and gas service records
Staff training and drill logs
If you have more than five employees, keep written records of the fire risk assessment. If you lack confidence in carrying out the assessment, engage a competent provider. Total Safe offers fire risk assessment services to help identify hazards and draw up a practical action plan.
Practical 30-day priority plan
If you need to act quickly, use this staged 30-day plan to reduce risk fast.
Days 1–3: Walk the kitchen, list hazards and remove immediate fire risks.
Days 4–10: Clean or replace hood filters; test fryer thermostats and isolation switches.
Days 11–20: Book TR19 vent-cleaning and a service for suppression systems.
Days 21–30: Deliver staff training, run a drill and update the fire risk assessment.
This staged approach reduces the highest risks first and gives a clear audit trail for regulators and insurers. For technical cleaning, ensure the contractor can provide TR19 or BESA verification; see BESA TR19 information.
When to call in specialists
Call a specialist when: you suspect grease build-up in concealed ductwork; you plan to install or modify fixed suppression systems; you use unusual fuels or solid fuel appliances; or your premises include linked residential or sleeping accommodation.
A competent contractor will assess, test and certify work. If you need help, book a site visit or a full fire risk assessment with Total Safe to get a professional action plan and evidence for insurers and the enforcing authority. Learn more about Total Safe.
Conclusion and recommended next steps
Summary: start with a systematic inspection, remove obvious risks, and put controls in place for extraction, suppression, electrical and gas safety, housekeeping and staff competence. Keep clear records and follow recognised cleaning standards such as TR19 for extract systems. Use heat detection in cooking areas and ensure escape routes remain unobstructed.
Next steps
Complete a focused kitchen walk-round and note any urgent actions.
Book TR19-compliant duct cleaning if you suspect grease build-up. See BESA TR19 guidance.
Arrange a fire risk assessment and tailored staff training. Consider Total Safe fire safety services.
Keep records and evidence to show compliance to the enforcing authority and your insurer. Refer to the GOV.UK guide for general legal guidance.
If the task feels beyond your team, get a competent third party to assess and act. Contact a competent fire safety provider and arrange a visit for a site survey or a written action plan.
FAQ
Q: How often should I clean my kitchen extract system?
A: Cleaning frequency depends on usage. High-use kitchens often need quarterly cleaning; medium-use kitchens usually require cleaning every six months. Ask for TR19 verification from your contractor. Further reading: TR19 grease standards insight and updates.
Q: Do I need a fixed suppression system over fryers?
A: Many busy kitchens and those with deep fat fryers require fixed wet chemical suppression. Your fire risk assessment will confirm if one is needed to meet safety and insurance expectations. See the GOV.UK guide.
Q: Can I rely on smoke detectors in the kitchen?
A: No. Heat detectors or rate-of-rise detectors are preferred in kitchens to avoid nuisance alarms while still detecting genuine fires early. NFCC guidance supports heat detection in cooking areas. See the NFCC guidance.
Q: What records should I keep to show compliance?
A: Keep the fire risk assessment, TR19 cleaning certificates, suppression and extinguisher service records, gas and electrical service logs, and staff training records. These demonstrate reasonable steps were taken. Refer to the GOV.UK guide for detail.
Q: Where can I find official guidance on kitchen ventilation and safety?
A: The HSE provides catering guidance including ventilation and maintenance advice, and GOV.UK publishes a practical guide for keeping small non-domestic premises safe from fire. See HSE catering guidance and the GOV.UK fire safety guide.
