In what scenarios is a pre-action sprinkler system typically used?

A pre-action sprinkler system is designed to provide fire protection in environments where the potential for damage to sensitive materials, equipment, or valuable assets is high. This system is unique because it requires two triggers to activate: first, a heat detector must sense the presence of fire, and then the system must be manually activated or an additional detection method (like smoke detection) must be triggered before water is released. This dual-action helps to minimize water damage that could occur from accidental discharge.

In settings such as data centers, museums, libraries, or other facilities housing delicate items, the pre-action system can safeguard against both fire and water damage, as it allows for more controlled management of the water release process.

While the other scenarios listed may involve important factors for deciding sprinkler types, they do not specifically address the primary application of pre-action systems, which is centered on protecting sensitive items and reducing collateral damage. High humidity environments, residential settings, and outdoor applications are better served by different types of sprinkler systems that cater to their specific challenges and requirements.