What type of occupancy uses deluge systems for fire protection?

Deluge systems are specifically designed for areas where there is a higher risk of fire due to the presence of flammable materials or processes. Extra hazard occupancies, which include industrial facilities, warehouses, and certain manufacturing plants, often contain materials or operations that can lead to fast-spreading fires.

In these environments, a deluge system, which consists of open nozzles that discharge large amounts of water over a wide area when activated, can be crucial. It allows for rapid suppression of fire, effectively soaking the area and reducing the intensity of the flames. The open nozzle design ensures that, upon activation, the entire area is flooded, which helps in preventing the fire from escalating.

Other types of occupancies, such as residential buildings, office complexes, and retail spaces, typically utilize sprinkler systems designed for lighter hazards, where the risk of fire is generally lower. Therefore, while they may have their own fire protection systems, they do not typically require the extensive coverage and suppression capabilities provided by deluge systems.