Where are WCFS nozzles typically located?

Where are WCFS nozzles typically located?

• A. Inside the hood or plenum above and around the cooking appliances to distribute agent.
• B. In the main kitchen storage area.
• C. On the exterior of the building.
• D. In the supply air duct downstream of the hood fan.

Answer: (A)

WCFS nozzles are placed inside the hood or in the plenum above and around the cooking appliances so the wet chemical can be discharged directly into the area where grease fires start. This placement ensures rapid, even distribution of the agent onto all cooking surfaces and surrounding hood interior, coating fats and oils and enabling the chemical to saponify fats for rapid suppression. Placing nozzles in other locations, like the storage area, on the building exterior, or in the supply air duct after the hood fan, would fail to deliver coverage where a grease fire actually develops and could contaminate the ventilation system or be ineffective. So the nozzles are located inside the hood/plenum to target the fire hazard precisely where it can do the most good.

WCFS nozzles are placed inside the hood or in the plenum above and around the cooking appliances so the wet chemical can be discharged directly into the area where grease fires start. This placement ensures rapid, even distribution of the agent onto all cooking surfaces and surrounding hood interior, coating fats and oils and enabling the chemical to saponify fats for rapid suppression. Placing nozzles in other locations, like the storage area, on the building exterior, or in the supply air duct after the hood fan, would fail to deliver coverage where a grease fire actually develops and could contaminate the ventilation system or be ineffective. So the nozzles are located inside the hood/plenum to target the fire hazard precisely where it can do the most good.