What is the acceptable temperature classification for sprinkler heads installed near heat ducts?

Sprinkler heads installed near heat ducts require a high-temperature classification to ensure proper functionality and safety. High-temperature sprinkler heads are designed to operate effectively in environments where elevated temperatures may be present, such as those near heating ducts. These heads typically have a higher activation temperature compared to other classifications, allowing them to withstand the heat produced by nearby ductwork without prematurely activating.

Using a high-temperature sprinkler head ensures that the system will respond appropriately to a fire event, rather than being triggered by the heat generated from the ducts during normal operation. This classification is crucial for maintaining effective fire protection in areas where temperature fluctuations can be significant, thereby preventing both nuisance activations and ensuring the reliability of the sprinkler system in an emergency.

In contexts where the temperature ranges are less critical, other types of sprinkler heads might be suitable, but in the presence of heat ducts, high-temperature heads are the appropriate choice.