Kitchen Hood Suppression Systems
Kitchen Hood Suppression Systems are built specifically for cooking-oil fires under commercial-kitchen exhaust hoods. They operate automatically via fusible links or a detection line, discharging a wet-chemical solution over cooking surfaces and the exhaust duct. They differ from portable K-Class extinguishers by being fixed and operating automatically without human intervention.
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Kitchen hood suppression systems are the critical fixed protection in commercial kitchens, where most oil fires occur. The design: a pressurized tank holding a wet-chemical solution (potassium acetate or citrate), copper or stainless piping running above cooking surfaces and into the exhaust duct, distributed discharge nozzles covering every appliance and the duct zone, a detection system with fusible links above each appliance (available in several temperature ratings chosen by appliance heat, e.g. 182°C, 232°C or higher), a main control valve, and automatic fuel shutoff (gas and electrical) on activation. Activation: when temperature over an appliance reaches the rated threshold (per the link rating), the link melts, the main valve opens, and solution discharges from every nozzle simultaneously. Coverage area: all nozzles over the cooking area + inside the duct (where flammable grease builds up). Applications: commercial restaurant and hotel kitchens, fast-food restaurants, hospital and school kitchens, fuel stations with restaurants, and large passenger ships. A substantive difference from portable K-Class extinguishers: hood systems are fixed and automatic, while portable units need human action and are used after hood activation to extinguish residual fire. Approval files and acceptance listings differ between modern wet-chemical models and earlier dry-chemical systems; confirm the selected model's approval documentation against project requirements before installation.
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Kitchen hood suppression systems are the critical fixed protection in commercial kitchens, where most oil fires occur. The design: a pressurized tank holding a wet-chemical solution (potassium acetate or citrate), copper or stainless piping running above cooking surfaces and into the exhaust duct, distributed discharge nozzles covering every appliance and the duct zone, a detection system with fusible links above each appliance (available in several temperature ratings chosen by appliance heat, e.g. 182°C, 232°C or higher), a main control valve, and automatic fuel shutoff (gas and electrical) on activation. Activation: when temperature over an appliance reaches the rated threshold (per the link rating), the link melts, the main valve opens, and solution discharges from every nozzle simultaneously. Coverage area: all nozzles over the cooking area + inside the duct (where flammable grease builds up). Applications: commercial restaurant and hotel kitchens, fast-food restaurants, hospital and school kitchens, fuel stations with restaurants, and large passenger ships. A substantive difference from portable K-Class extinguishers: hood systems are fixed and automatic, while portable units need human action and are used after hood activation to extinguish residual fire. Approval files and acceptance listings differ between modern wet-chemical models and earlier dry-chemical systems; confirm the selected model's approval documentation against project requirements before installation.
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