Kidde KF31 Sentry Mains Powered Interconnectable Heat Alarm with 9V Battery Back-Up

The Kidde KF31 Sentry Heat Alarm is a high-performance mains-powered heat detector designed for use in kitchens, garages, lofts and other areas where smoke alarms may be unsuitable. Featuring a reliable thermistor heat sensor, the KF31 responds quickly to dangerous rises in temperature while helping to minimise false alarms caused by cooking fumes, steam or dust.

This interconnectable heat alarm can be linked with up to 23 compatible Kidde FIREX smoke, heat and carbon monoxide alarms. When one connected alarm detects danger, all units sound simultaneously to provide enhanced protection throughout the property.

Supplied with Kidde’s Quick-Fit Slide-On Base, the KF31 allows for quicker and cleaner installation. The integrated cable management system keeps wiring organised, while the 150mm flared base plate provides a neat finish during retrofit installations.

Key Features

• Mains-powered heat alarm with 9V alkaline battery back-up
• Thermistor heat sensor for dependable temperature detection
• Interconnects with up to 23 compatible Kidde FIREX alarms
• Quick-Fit Slide-On Base for fast and simple installation
• 150mm flared base for clean retrofitting of existing alarms
• Integrated cable management for tidy wiring connections
• Alarm memory identifies the activated unit within the network
• Combined Test/Hush button for testing and silencing nuisance alarms
• Automatic reset after activation
• Tamper-resistant locking device prevents unauthorised removal
• Suitable for kitchens, garages, lofts and dusty environments
• Fully compatible with Kidde FIREX smoke, heat and CO alarms
• 10-year manufacturer warranty

Ideal Applications

The Kidde KF31 heat alarm is ideal for locations where smoke alarms may trigger unnecessary alarms due to steam, dust or cooking fumes, including:

• Kitchens
• Garages
• Loft spaces
• Utility rooms
• Residential properties requiring Grade D2 fire detection

Technical Specifications

• Model: KF31
• Power Supply: 230V mains with 9V alkaline battery back-up
• Sensor Type: Thermistor (thermal resistor) heat sensor
• Alarm Volume: Minimum 85dB at 3 metres
• Alarm Frequency: 3.2 kHz typical
• Interconnectivity: Up to 23 compatible alarms
• Alarm Grade: D2
• Approvals: BSI certified to BS 5446 Part 2:2003
• Dimensions: 150mm x 150mm x 66mm
• Weight: 281g including battery
• Operating Temperature: -10°C to +40°C
• Humidity Range: Up to 93% RH non-condensing
• Warranty: 10 Years

Compliance & Installation

The Kidde KF31 complies with UK Building Regulations and BS 5839 Part 6 requirements for Grade D domestic fire alarm systems. Installation should be carried out by a qualified electrician. Heat alarms are particularly recommended for kitchens and other areas where optical smoke alarms may be prone to nuisance triggering.

Downloads

Data Sheet:
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Instruction Manual:
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