Kitchens produce great amounts of steam and cooking smoke and ordinary smoke alarms are not able to cope with these confusing signals. An ionisation smoke alarm or even an optical smoke alarm would quickly be set off when a kitchen is being used. At the same time fires regularly start in the kitchen, so rapid fire detection is important.
Luckily, there is an easy solution available. Heat alarms or heat detectors work by detecting either rapidly rising temperatures or trigger when a certain temperature is reached. Heat detectors do not get set off by steam or smoke or the normal cooking tempreatures. The thermistor in the heat detector head only detects the temperature changes mentioned above and ignores all other influences.
To notify the rest of the house of a fire in the kitchen you do not need to rely solely on the siren in the heat detector. You can interconnect the heat detectors with other smoke alarms in the house either with wire or through radio-frequency. The latter avoids you having to lay cables between alarms.
Heat detectors are also installed in garages and other areas where smoke or gases are present (with exception of bathrooms).
More information about the workings of heat detectors and other smoke alarms can be found in our smoke alarm guide.