Fire alarms detect fire by monitoring the changes in environment-related with combustion. They are often confused with smoke alarms because they may also detect smoke.
A written record of fire assessment is required by law if there are more than five employees in the commercial environment. The fire assessment will determine the number of fire alarms required in the building and the fire precautions that should be practiced to protect the facility and the staff.
Fire alarms can be combined with other systems creating a more efficient and safer system. A fire alarm can be linked with the fire sprinkler systems; when the fire alarm is triggered, the fire sprinkler system is automatically activated. It can also be connected to the local fire station; the fire department will immediately receive an alert when the fire alarm is set off.
Fire alarms are more commonly used in commercial environments than in residential properties because of the system's complexity.