- UL521/ULC S530
- Fixed Temperature and rate-of-rise
- Comprehensive self diagnostics
- Slim design – visually appealing
Intelligent addressable heat detectors are vital for life safety, as often the heat from a fire can be detected before smoke buildup happens. This can give the few extra minutes needed to evacuate and save lives. The FW521 offers both fixed temperature and rate-of-rise detection in a single unit.