Fire alarms are devices whose sole purpose is to detect fire inside a home or structure. Nowadays, the installation of fire alarms as well as fire prevention systems is becoming a requirement in order to ensure the safety of occupants should a fire occur. These fire prevention systems should be able to detect a fire within an area before it starts to spread.
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The overall design of fire alarms is mandated to follow certain building code and insurance policies. Most of their system design follows a certain interface and components with a standardized installation method to ensure the device is in good working condition. They are designed to locate signs of fire in a structure by detecting any of the following: presence of smoke, increased air temperature, or significant amount of carbon monoxide. These are the three signs of a looming fire in an area. A smoke detector detects the presence of smoke, a thermostat detector detects the increase in air temperature, and a carbon monoxide detector detects the presence of a colorless and odorless but lethal gas. If the fire alarm system detects any of the two signs, the area in question will be checked immediately. If there is indeed fire in the area, fire protocols will need to be followed such as the use of fire extinguishers and the evacuation of occupants.
Most fire alarms are usually audible devices. They sound out an alarm of an impending fire. However, for those who deaf and cannot hear an audible alarm, a textual alarm is signaled to help notify them. For those who are deaf and blind, an olfactory signal is added to signal them of the fire.
Fire alarm devices are helpful in letting us know of a looming fire within a home, a building, or any structure for that matter. They are in most cases a life saver.

