How does a deluge sprinkler system function in the event of a fire?

A deluge sprinkler system is designed to provide large volumes of water over a wide area in the event of a fire. When a fire occurs, the system is activated, leading to the release of water from all sprinkler heads simultaneously, regardless of the temperature. This makes it particularly effective for high-hazard areas where rapid fire spread could occur, as it ensures that the water reaches the fire immediately across the entire designated area.

The design of this system contrasts sharply with other types of sprinkler systems that operate based on the heat detected at individual sprinkler heads, releasing water only where the fire has reached. By releasing water from all heads, the deluge system enhances the firefighting capability, allowing for a more robust and immediate response to prevent further escalation of the fire.

The other options do not align with how a deluge system operates: it does not require manual activation; it utilizes water rather than chemicals; and it does not activate selectively based on heat but rather water is discharged from all heads once the system is triggered.