Commercial kitchen fires account for 40% of all restaurant fires in the UK. This comprehensive guide covers extraction cleaning, suppression systems, and compliance requirements.. The Kitchen Fire Problem Commercial kitchens represent one of the highest fire risk environments in the UK. The combination of open flames, hot oils, grease laden extraction systems, and time pressure creates a perfect storm for fire incidents. UK Kitchen Fire Statistics 2,400+ commercial kitchen fires annually £180 million in property damage per year 40% of all restaurant fires start in the kitchen Fat fryer fires account for 54% of commercial cooking fires Average claim : £75,000 for a kitchen fire Business interruption : average 4 6 months closure after significant fire Regulatory Framework Building Regulations Approved Document B — compartmentation, means of escape, ventilation Gas Safety (Installation and Use) Regulations 1998 — gas appliance installation Electrical Equipment (Safety) Regulations 2016 — electrical safety Fire Safety Legislation RRO 2005 — fire risk assessment, maintenance, staff training BS 6173:2009 — installation and maintenance of gas fired catering appliances DW/172 — specification for kitchen ventilation systems (BESA) TR/19 — grease hygiene for kitchen extract systems (BESA) Extraction System Design and Maintenance Design Requirements Minimum air velocity : 0.4 m/s capture velocity at cooking zone Grease filters : baffle type, minimum 400mm depth, accessible for cleaning Ductwork : welded stainless steel, minimum 1.2mm thickness Fire dampers : at every compartment penetration Fan position : discharge to external air at high level TR/19 Cleaning Schedule Kitchen Type Cleaning Frequency Heavy use (24hr, fast food) Monthly Moderate use (restaurant) Quarterly Light use (café) 6 monthly Very light use (reheat only) 12 monthly Suppression Systems Wet Chemical Systems (Ansul, Amerex) Pre engineered systems designed for specific kitchen layouts Automatic activation via fusible links at 182°C or heat detectors Manual activation via pull station at exit point Agent : potassium carbonate based wet chemical Coverage : all cooking appliances, extraction hood, plenum, and duct Fuel shut off : automatic gas/electric isolation on activation Water Mist Systems Alternative for kitchens where wet chemical is impractical High pressure mist — effective on Class F (fat) fires Less residue — faster return to service after activation Combined protection — can protect cooking and dining areas Staff Training Requirements Under the RRO 2005, kitchen staff must receive: 1. Induction training — fire procedures on first day 2. Fire extinguisher training — wet chemical and fire blanket use 3. Evacuation procedures — including customer management 4. Extraction system awareness — filter removal and basic cleaning 5. Gas safety — emergency shut off procedures 6. Refresher training — minimum annually, more frequently for high risk kitchens Insurance Requirements Annual extraction cleaning certification — TR/19 compliant Suppression system servicing — 6 monthly by manufacturer approved engineer Fire risk assessment — current and reviewed annually Staff training records — documented and dated Electrical testing — annual PAT testing, 5 yearly fixed wiring test Magnus Opifex SEVEN LTD — UK's Leading Fire Safety & Fire Engineering Consultancy 🌐 magnus opifex.co.uk 📞 +44 7486 691724 ✉️ office@magnus opifex.co.uk Founders: Nicoleta Vasile, Baroness of Brattleby — CEO, Lawyer and Barrister, Legal & Administrative Director Alina — Technical Director & Expert Fire Engineer (BEng) Head Office: Ealing Cross, 85 Uxbridge Road, London W5 5BW Magnus Opifex SEVEN LTD delivers engineering led fire engineering, fire risk assessments, CFD modelling, and building safety consultancy across the United Kingdom and internationally. With over 20 years of combined experience and a UK portfolio spanning healthcare, residential and infrastructure, we bring truly engineered solutions with a personal touch. © 2026 Magnus Opifex SEVEN LTD. All rights reserved.