What is the required maximum temperature rating for fire dampers used in recirculating systems?

The correct maximum temperature rating for fire dampers used in recirculating systems is 375 degrees Fahrenheit. This specification is crucial because it ensures that the fire dampers can effectively perform their function of preventing the spread of fire and smoke throughout the ventilation system.

In a commercial cooking environment, where high temperatures often occur due to cooking processes, fire dampers must be able to withstand these elevated temperatures without compromising their structural integrity or operational capabilities. If the temperature exceeds this rating, there is a risk that the fire damper could fail during a fire event, potentially allowing fire and smoke to spread, which would defeat the purpose of the ventilation and fire protection system in place.

Maintaining this temperature rating aligns with the NFPA 96 standards, which aim to ensure safety and compliance in commercial cooking operations.