What type of sprinkler system is commonly used when freezing is a consideration?

A dry pipe system is the correct choice in scenarios where freezing is a concern. This system is designed to prevent water from being contained within the sprinkler pipes until activated by a fire. Instead of having water in the pipes, the system maintains air pressure in the pipes, which helps to reduce the risk of freezing. When a sprinkler head is activated, the air pressure drops, allowing the valve to open and water to flow from the source into the pipes and out through the activated sprinkler head.

Wet pipe systems, while effective in many situations, contain water at all times and are more susceptible to freezing when exposed to cold temperatures. A deluge system is not typically used with freezing considerations; instead, it features open sprinkler heads and is activated by a fire detection system, allowing water to flood the area immediately but does not address the freezing risk directly.