What is the standard temperature rating for most fire sprinkler heads?

The standard temperature rating for most fire sprinkler heads typically falls between 135°F to 170°F. This temperature range covers a common category of sprinkler systems used in various types of buildings, ensuring efficient activation when exposed to a fire event.

Sprinkler heads are designed to respond at specific temperatures to provide timely suppression of fires. The lower limit of 135°F is often used in light hazard areas, where the fire risk is minimal, while the upper limit of 170°F is more suited for ordinary hazard areas. This range aids in ensuring that the system activates effectively without unnecessary false alarms or delays in response.

Other temperature ranges, such as those outlined in the other options, generally correspond to different types or classes of applications. For instance, ratings above 170°F are typically reserved for more hazardous environments or specialized applications, while ratings below 135°F may not provide adequate safety measures for most structures. Understanding these ratings helps in selecting the appropriate sprinkler head for various environments and their associated fire risks.