The highest standard of fire alarm property protection will be afforded by a Category P1 system. In a Category P1 fire system, automatic fire detection is installed in all areas of the building. This Category of fire system might be appropriate if the fire system is intended to satisfy the requirements of fire insurers, if the building or its contents
are of high value, or if the facilities provided within the building are critical to the operations of an organization.
A lower, but often adequate, standard of property protection may be afforded by a fire alarm designed to an Category P2 system. This is usually determine by a fire risk assessment. In a Category P2 system, automatic fire detection, is provided only in specified rooms or areas of the building.
The protected areas by the fire alarm are usually those in which the fire hazard level is high, or from which there is significant potential for fire to spread and cause damage to contents of high value. Since the determination of these factors will depend on a fire risk assessment, it is important that whoever specifies a Category P2 system qualifies this description with details of the rooms or areas that are to be protected.
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