If dry system piping is located in a non-heated attic, what type of sprinkler can be utilized?

In a non-heated attic where dry system piping is present, the use of a dry type sprinkler is appropriate. Dry type sprinklers are specifically designed to be used in environments that are susceptible to freezing temperatures. They do not contain water in the piping until a fire event triggers the system, which helps to prevent any water from freezing and causing blockages that could impair fire suppression efforts.

This choice stands out because dry type sprinklers feature a mechanism that keeps the water valve closed, preventing water from entering the piping system until needed, thus protecting against issues related to freezing. Choosing a different type of sprinkler, like an open nozzle type or standard response sprinkler, could lead to potential failure in a freezing environment, as these types might not be designed to handle the conditions found in an unheated space.

The correct selection is therefore based on the need to ensure that the system remains functional and reliable in cold climates without the risk of freezing, which is a critical factor to consider in fire protection design.