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An automatic fire alarm system is designed to detect the unwanted presence of fire
by monitoring environmental changes associated with combustion. In general, a fire
alarm system is classified as either automatically actuated, manually actuated,
or both. Automatic fire alarm systems are intended to notify the building occupants
to evacuate in the event of a fire or other emergency, report the event to an off-premises
location in order to summon emergency services, and to prepare the structure and
associated systems to control the spread of fire and smoke.
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