What is the required sprinkler temperature classification for an unventilated attic space?

In unventilated attic spaces, the environment can reach elevated temperatures, particularly during extreme weather conditions. Sprinkler temperature classifications are designed to ensure that the sprinklers activate at appropriate temperatures for the space in which they are installed.

Intermediate temperature sprinklers, which typically have an activation temperature around 180°F (82°C), are suited for applications where the risk of fire is present, but the ambient temperature may exceed the thresholds associated with standard temperature sprinklers. In contrast, standard temperature sprinklers are designed for areas where the maximum temperature does not exceed 100°F (38°C).

By using intermediate temperature sprinklers in unventilated attics, the system can effectively respond to fire without prematurely activating due to ambient heat. This option balances the risk of fire against the thermal conditions likely to be found in such spaces, ensuring that the system is both efficient and effective when needed.