What is the starting setpoint temperature for fixed temperature detectors?

The starting setpoint temperature for fixed temperature detectors is established to ensure that they activate appropriately during a fire situation. Fixed temperature detectors are designed to respond when the temperature reaches a certain threshold, which is typically set to indicate a significant rise above normal ambient temperatures due to a fire.

The correct answer, which is 100 degrees Fahrenheit, is commonly recognized as the standard activation temperature for many fixed temperature heat detectors. This setpoint allows the detector to function effectively while minimizing false alarms that could be caused by typical household activities or environmental changes.

In the context of fire detection, it's crucial that the setpoint is not too low to avoid unnecessary activation due to non-fire events, nor too high where it may fail to alert occupants in a timely manner. Therefore, the choice of 100 degrees Fahrenheit strikes a critical balance for reliable detection in residential and commercial settings.