Which type of fire suppression system is most suitable for a server room in freezing temperatures?

A dry-pipe system is the most suitable type of fire suppression system for a server room in freezing temperatures because it is designed specifically to prevent issues related to freezing conditions. In a dry-pipe system, the pipes are filled with pressurized air rather than water. When a fire is detected, the air pressure causes a valve to open, allowing water to flow from a remote storage tank. This design minimizes the risk of water freezing in the pipes, which can be a significant concern in cold environments, especially in server rooms where sensitive electronic equipment is stored.

Other suppression systems, such as wet-pipe systems, maintain water within the pipes at all times, making them vulnerable to freezing in low temperatures. Foam systems, while effective for certain types of fires, are not typically used in environments filled with electronic equipment as they can damage the hardware. Gas-based suppression systems, like FM-200 or CO2, are indeed effective for server rooms as they do not leave residue and can quickly smother a fire, but they may not be as effective in specific temperature scenarios compared to a dry-pipe system designed to address the unique challenges posed by freezing conditions.