FireAngle Thermistek Heat Alarm is a patented heat dish to target radiated heat directly onto the heat sensor for a faster reaction to potential fire risk. Normal smoke alarms are unsuitable for use in kitchens due to the amount of false alarms activations from the likes of burnt toast. Heat alarms are best suited to areas where dust, fumes and moisture can cause nuisance alarms in smoke alarms. Thermistek technology, incorporating a unique radiant heat dish. Low energy usage – typically less than 10% of the average 230V AC heat alarm. Wi-Safe 2 and hardwired alarms on a single network. Mains and battery powered alarms on a single network.