Mains Powered Heat Alarm with Back-Up Battery - Kidde Firex Sentry KF31

The Kidde KF31 and KF31R are mains-powered heat alarms, delivering dependable fire detection for kitchens, garages, and other high-risk areas. These alarms combine a 230V AC supply with a 9V battery backup (KF31) or a self-charging lithium battery backup (KF31R) for continuous protection. Designed for quick installation and reliable performance, they feature a practical Quick Fit base and can be interconnected with other Kidde alarms for whole-property safety.

• Power: 230V mains-powered with battery backup
• Backup: Optional alkaline or self-charging lithium backup battery versions
• Warranty: 10-year warranty
• Ideal for installation in kitchens and garages
• Thermistor heat sensor for accurate temperature detection
• Interconnectable with up to 23 other Kidde / Firex alarms via cable
• Loud 85dB alarm at 3 metres for clear alerts
• Quick-Fit slide-on base for fast and easy installation with a tamper-resistant locking mechanism
• Test & hush button for checking operation and silencing nuisance alarms
• Alarm memory function identifies the triggered unit with automatic reset after activation
• CE and UKCA marked
• Kitemarked BS 5446-2: 2003
• Suitable for installations complying with BS 5839-6: 2019 Grade D2 (KF31) or Grade D1 (KF31R)
• Comes with a coloured dust cover (to protect alarm temporarily if dusty works are carried out)
• These alarms are suitable for both the Welsh and Scottish 2022 legislation