What temperature rating is required for sprinklers located under skylights?

Sprinklers located under skylights typically require an intermediate temperature rating. This is primarily due to the fact that skylights can cause increased temperatures in the area beneath them, especially when exposed to direct sunlight. An intermediate rating, which usually ranges from 175°F to 225°F, provides adequate protection by activating at a temperature that accounts for the potential heat buildup caused by the sunlight streaming through the skylights.

Standard temperature-rated sprinklers, while appropriate for many applications, may not respond quickly enough in situations where elevated temperatures are experienced due to direct sunlight. High or low temperature ratings would not be suitable in this context because they either activate at too high or too low temperatures, respectively, potentially leading to inadequate fire protection under such conditions. Using the correct temperature rating ensures that the sprinkler system functions effectively, protecting the structure and occupants by controlling potential fire hazards coming from the specific environment created by skylights.