AJAX EN54 Fire & Safety FireProtect (Heat) Black Wireless Heat Detector

In a fire, every second counts. The AJAX FireProtect (Heat) Black is a wireless heat detector engineered to deliver rapid, reliable alerts the moment temperatures rise dangerously—no smoke required. Built to EN 54-5 standards, it senses fixed temperature thresholds between +54°C and +65°C, triggering an 85 dB built-in siren and instant notifications to your Ajax hub. Whether you're protecting a kitchen, garage, or boiler room, this detector provides peace of mind with professional-grade performance and a sleek black finish.

Who is it for

This heat detector is ideal for homeowners, business owners, and security professionals who need dependable fire detection in areas where smoke detectors may cause false alarms—such as kitchens, dusty workshops, or spaces with fluctuating temperatures. It integrates seamlessly with Ajax security systems, making it perfect for those already using Ajax hubs or range extenders.

Main features

• Fixed temperature heat detection (EN 54-5 certified) triggers at +54°C to +65°C
• Built-in 85 dB siren for immediate on-site alarm
• Jeweller wireless technology with up to 1300 m line-of-sight range
• Tamper protection alerts you to any attempt to disable or remove the device
• Long battery life up to 4 years using 2 x CR2 batteries (plus CR2032 backup)
• Indoor ceiling or wall mounting for flexible installation
• Compatible with all Ajax hubs and ReX range extenders

Specifications

• Detection method: Heat (fixed temperature)
• Alarm type: Built-in siren
• Siren volume: 85 dB at 3 m
• Wireless technology: Jeweller
• Wireless range: Up to 1300 m (line of sight)
• Power supply: 2 x CR2 batteries, 1 x CR2032 backup battery
• Battery life: Up to 4 years
• Operating temperature: 0°C to +65°C
• Operating humidity: Up to 80%
• Installation environment: Indoor
• Colour: Black
• Certification: EN 54-5
• Temperature threshold: +54°C to +65°C
• Tamper protection: Yes
• Compatibility: Ajax Hubs, ReX range extenders
• Communication frequency: 868.0 – 868.6 MHz
• Mounting type: Ceiling/Wall

Tips

For optimal performance, install the FireProtect (Heat) on the ceiling in the centre of the room, away from air vents or direct sunlight. Test the detector monthly by pressing the test button, and replace batteries when the low battery alert appears in the Ajax app. Pair it with Ajax smoke detectors for comprehensive fire coverage.