Ansul System
An Ansul system (named after the manufacturer, now part of Tyco/Johnson Controls) is a wet chemical fire suppression system installed in commercial kitchen hoods above cooking equipment that produces grease-laden vapors—fryers, grills, woks, and broilers. When activated by heat detection or manual pull, the system discharges a potassium-based wet chemical agent that smothers grease fires and cools cooking surfaces.
Why It Matters for Operators
NYC fire code requires Ansul systems in all commercial kitchens with grease-producing equipment. Without one, you cannot pass FDNY inspection or obtain a C of O for restaurant use. Installation costs $3,000-$10,000 depending on the number of nozzles and the size of the hood. Annual inspections are mandatory, and the system must be professionally recharged after any discharge—accidental or otherwise.
FWDRE Insight
When evaluating a second-gen restaurant space, check the Ansul system's last inspection tag—if it hasn't been inspected in over a year, budget for a full service ($500-$1,500). Also verify the system coverage matches your planned equipment layout. Moving a fryer to a position not covered by an existing nozzle requires a system modification, which can cost $2,000-$5,000.
Related Terms
A commercial space with ductwork to exhaust cooking fumes, smoke, and heat through the roof of the building.
A previously occupied commercial space with an existing buildout from a prior tenant in the same or similar use.
NYC Department of Buildings document certifying a building's legal use and maximum occupancy.
The construction process of converting a raw or existing commercial space into a finished, operational business environment.
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