FireAngel's HW1-PF-T heat alarm is highly effective in the early detection of increased heat due to its Thermistor technology which measures the rate of increase. Ideal to install in your kitchen and provides advanced class A2 heat detection to protect the room that most accidental fires start in. The HW1-PF-T can be interconnected into a network of up-to 12 x Smoke, Heat or Carbon Monoxide Alarms or wirelessly interconnected into a network of up to 50 alarms with the RF interlink base (RF-BW-T). Key Features Thermistor heat sensor - designed to detect rate of increase in temperature Mains powered with replaceable 9V battery back-up Hardwire interconnect up-to 12 x SW1-PF-T Smoke Alarms, HW1-PF-T Heat Alarms & CW1-PF-T Carbon Monoxide Alarms. Interconnect up to 50 alarms with the RF Interlink Base RF-BW-T Provides advanced class A2 detection (54?C - 70?C) Loud 85dB alarm (3 meters) and includes low battery warning feature Large central button to test and silence Easy to install Push2Fit base 5-year warranty (not including replaceable battery) Certified to BS EN 5446-2:2003