Commercial kitchen fire suppression and hood cleaning contractors
Suppression contractors install and service the pre-engineered wet-chemical systems in a commercial cooking hood. These systems detect fire over the appliances, release agent and shut off the fuel. A separate trade, exhaust (hood) cleaners, removes grease from hoods, filters, ducts and fans. The two jobs are often sold together but are different skills and credentials.
Who needs one
Businesses: any commercial kitchen with grease-producing cooking under a hood (fryers, griddles, charbroilers, woks, ranges) must have a listed hood suppression system and a Class K extinguisher. NFPA 96 sets this in the US; in Canada, NFPA 96 is referenced by the NBC/NFC and provincial codes. That includes restaurants, cafeterias, food trucks in many jurisdictions, churches and community halls with commercial lines. Homes: not applicable.
How often
Suppression system: inspected and serviced every 6 months by a qualified technician (NFPA 96/17A), fusible links replaced on the schedule set by NFPA 17A and the manufacturer, and a 12-year hydrostatic test on agent cylinders. Exhaust system inspected and cleaned by cooking volume (NFPA 96 Table 11.4): monthly for solid fuel (wood or charcoal), quarterly for high volume (24-hour, charbroiling, woks), semi-annually for moderate volume, and annually for low volume (churches, day camps, seasonal). Staff clean filters and check equipment daily or weekly. Class K extinguisher: monthly check and annual service (NFPA 10).
What it costs
Semi-annual suppression system inspection: about US$150–500 per visit (CA$200–700), depending on hood length, number of tanks and travel (fireprotectionfinder.com). Hood exhaust cleaning is priced separately by hood length, duct run and access. Get two quotes. Fusible links, nozzle caps and recharges after a discharge cost extra.
Codes and standards
- Canada
- Ventilation and fire protection: NFPA 96, referenced by the NBC/NFC and provincial codes. Wet-chemical systems: NFPA 17A. System units are tested to ULC/ORD-C1254.6, the Canadian counterpart to UL 300. Class K extinguishers: NFPA 10. Some cities add hood-cleaning rules (e.g., Vancouver requires ASTTBC 'CO' technicians).
- United States
- NFPA 96, adopted through the IFC/NFPA 1. Wet-chemical systems: NFPA 17A. Systems listed to UL 300. Class K extinguishers: NFPA 10. Hood cleaning: NFPA 96 Ch. 11–12 and ANSI/IKECA C10 (cleaning) and I10 (inspection) are widely used.
Licences and credentials to look for
- Canada
- BC: ASTTBC 'SP' (special suppression) for the system and 'CO' for kitchen exhaust cleaning. Elsewhere: manufacturer factory certification for the system brand (e.g., Ansul, Amerex, Kidde, Pyro-Chem, Buckeye). Ask to see the current certificate, since it expires. Ask your fire department whether there is local hood-cleaner registration.
- United States
- State fire marshal licensing for pre-engineered kitchen systems in many states (e.g., Texas SFMO; California State Fire Marshal). Current manufacturer certification for the system brand. NICET Special Hazards for some techs. For hood cleaners: IKECA certification (CECS/CESI) or a state or local registration where required.
Questions to ask and red flags
- Ask for the technician's current factory certificate for your system's brand. Uncertified techs may not be able to buy parts or legally service it.
- Ask whether your system is UL 300 / ULC-C1254.6 compliant. Older dry-chemical hood systems no longer meet code and must be replaced.
- Ask the hood cleaner for before-and-after photos of the duct and fan, not just the hood, and a certificate or label posted at the hood.
- Ask whether the suppression contractor will re-check nozzle aiming after any appliance is moved or swapped. A new fryer under old nozzles is a common failure.
- Red flag: the cleaner offers to 'skip the ducts' to save money, or leaves no service label.
What they install or service: Commercial Kitchen Fire Suppression