Heat Alarms: They detect the increase in temperature from a fire and are insensitive to smoke. Optical alarms can be installed near (not in) kitchens, as they are less likely than ionisation alarms to go off when toast is burned. They are marginally less sensitive to fast flaming fires. Optical: These are more expensive but more effective at detecting larger particles of smoke produced by slow-burning fires, such as smouldering foam-filled upholstery and overheated PVC wiring. They can also be too over-sensitive near kitchens. They are marginally less sensitive to slow burning and smouldering fires which give off larger quantities of smoke before flaming occurs. They are very sensitive to small particles of smoke produced by fast flaming fires, such as paper and wood, and will detect this type of fire before the smoke gets too thick. Ionisation: These are the cheapest and cost very little to purchase. There are mainly fourВ types of smoke alarm currently on the market вЂ“ ionisation, optical (also described as photo electronic), heat and combined. They can detect fires in their early stages and give you those precious minutes to enable you and your family to leave your house in safety. They are about the size of a hand and are normally fitted to the ceiling. Smoke alarms are self-contained devices that incorporate a means of detecting a fire (smoke detector) and giving a warning (alarm), usually a very loud beeping sound. In fact you are twice as likely to die in a house fire that has no smoke alarm than a house that does.Д«uying a smoke alarm could help save your home and the lives of you and your family. Every year the fire and rescue service is called to over 600,000 fires which result in over 800 deaths and over 17,000 injuries.В About 50,000 (140 a day) of these are in the home and kill nearly 500 and injure over 11,000, many which could have been prevented if people had an early warning and were able to get out in time.

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