Fire Alarm Initiating Devices
Unlike a smoke detector, heat detectors are not life safety devices. They don’t trigger unless a fire has already started, whereas, a smoke detector can trigger as soon as smoldering occurs. They typically are used in areas where a smoke detector can’t be used due to smoke from non-life threatening sources such as a kitchen in a restaurant or an auto garage.
Heat Detector Types
There are two types of heat detectors used in fire alarm systems:
- Rate-of-Rise Heat Detectors
This type of heat detector operates on a rapid rise of temperature in a set time frame. This allows them to be used in scenarios where a lower temperature fire condition occurs.
- Fixed Temperature Heat Detectors
These detectors trigger when a set temperature is reached. They come in a variety of temperatures, allowing them to be used in areas where temperatures may already be high and/or change rapidly, like attics.