Automatic fire detection on wireless fire alarms or wired fire alarm systems, is also commonly used to protect buildings by ensuring the early attendance of the fire brigade, as a result of the summoning of the brigade by occupants of the building or by transmission of fire alarm signals to an alarm receiving centre from where the fire brigade service will be called. Automatic fire detection systems might, therefore, be required or recommended by the property insurers or after a fire risk assessment.
When designing a wireless fire alarm or a wired system,the early detection of fire by automatic means, and rapid summoning of the fire service, is also important in premises in which staff, residents, people with a disability cannot readily be evacuated immediately in the event of fire (e.g. hospitals).
Manual fire alarm systems are often sufficient to satisfy legislation in workplaces in which no one sleeps, but once again a fire risk assessment would be required to assess the risk.
Wireless fire alarms or wired automatic fire detection is usually required by legislation to supplement the manual system in premises in which people sleep. Automatic fire detection might also be necessary to satisfy legislation under the following
circumstances:
a) where the automatic fire detection forms part of a fire engineering solution;
b) where fire protection systems, such as door closing facilities or smoke control systems, are to be operated
automatically in the event of fire;
c) where the low level of occupancy of a building, or part of a building, is such as to create the potential
for fire to prejudice means of escape by occupants before they are aware of the fire.
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