In a system where antifreeze is used, what is the recommended temperature of the antifreeze solution?

The recommended temperature range for an antifreeze solution in a fire sprinkler system is critical for ensuring both effective system performance and prevention of water freezing. The correct range of 32°F to 50°F serves as a balance where the antifreeze can maintain its effectiveness without risking crystallization or freezing in colder temperatures.

Staying above 32°F is vital because temperatures at or below this level could lead to freezing, which would compromise the system's operational capability. At the same time, a maximum upper limit of 50°F helps ensure that the antifreeze maintains optimal flow and results in appropriate discharge times during activation.

By choosing this temperature range, it supports the reliable function of the sprinklers while ensuring that risks associated with freezing in colder weather conditions are mitigated efficiently.