In environments like kitchens and garages which are regularly filled with smoke, both optical and ionisation smoke alarms can be rendered ineffective. This means that heat detection is the only viable way for fire safety equipment to be deployed in these areas. Like all other forms of fire alarms, it is recommended that heat detecting alarms are also interconnected with the other smoke alarms installed on escape routes to provide the optimum early warning and detection system. This interconnection can be achieved cost-efficiently with radio-interlink, even in small commercial properties.
It is important to know where to install a heat alarm, however. A good location is on the ceiling near a stove or cooker and the rising heat will trigger the alarm once the temperature reaches a certain level. Simply overcooking or burning what is in the oven will not cause false alarms. Specially designed stove alarms can also be purchased which can be fitted to the hood of a cooker and raise an alarm if a pan boils dry.
Deciding on whether to connect the alarm to the mains or have it run on a battery can be an important factor when it comes to adhering to building regulation and other guidelines as well as considering long term maintenance. Heat alarms with normal alkaline batteries will require a yearly battery change, however, these days some alarms are supplied with lithium longlife batteries that designed to last around 10 years, but this does not mean that regular checks are not required.
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