In a kitchen exhaust system, if the hood exhaust fan would continue to operate after extinguishing system activation unless listed components require otherwise. Which statement describes this requirement?

In a kitchen exhaust system, if the hood exhaust fan would continue to operate after extinguishing system activation unless listed components require otherwise. Which statement describes this requirement?

• A. Stop immediately
• B. Continue to operate
• C. Run only on manual demand
• D. Be isolated from power

Answer: (B)

The main idea here is that, in a kitchen exhaust system, the hood exhaust fan is intended to keep running after the fire-suppression system releases its agent, unless a listed component dictates otherwise. This continued operation helps vent heat and smoke away from the kitchen and assists in carrying extinguishing agents out of the space, reducing the chance of re-ignition and making it safer for occupants and responders. Stopping the fan immediately would let smoke and heat accumulate in the kitchen, which is undesirable. Relying only on manual demand would miss automatic protection during a fire event, and isolating the fan from power defeats the purpose of ventilation entirely. Only if there is a listed device that requires a shutdown would the fan stop; otherwise it should continue to operate.

The main idea here is that, in a kitchen exhaust system, the hood exhaust fan is intended to keep running after the fire-suppression system releases its agent, unless a listed component dictates otherwise. This continued operation helps vent heat and smoke away from the kitchen and assists in carrying extinguishing agents out of the space, reducing the chance of re-ignition and making it safer for occupants and responders. Stopping the fan immediately would let smoke and heat accumulate in the kitchen, which is undesirable. Relying only on manual demand would miss automatic protection during a fire event, and isolating the fan from power defeats the purpose of ventilation entirely. Only if there is a listed device that requires a shutdown would the fan stop; otherwise it should continue to operate.