What type of system is designed to protect spaces with sensitive materials?

A preaction system is specifically designed to protect spaces housing sensitive materials—such as data centers, art galleries, or libraries—where water damage from accidental discharge could cause serious harm. This system combines features of both a sprinkler and a traditional fire detection system, offering enhanced protection. In a preaction system, the pipes are filled with air rather than water. Water is allowed to enter the pipes only after a fire detection sensor (usually a heat or smoke detector) has been triggered. This helps to ensure that water is released only in response to an actual fire condition, significantly reducing the risk of water damage.

Additionally, preaction systems can be configured in a variety of ways, such as having a double interlock system that requires both smoke detection and a manual pull station activation before water is released. This layered approach adds an extra level of safety and control, making it ideal for environments that contain critical and sensitive materials that would be vulnerable to water damage. Such systems are essential in maintaining the integrity of the materials stored within protected spaces while still providing active fire suppression.