Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Object Groupings and Systems (hierarchy name)
4. systems (equipment)
5. [systems by function]
6. protection systems
7. fire protection systems

Narrower term/s

• auxiliary fire alarm systems
• local fire alarm systems
• proprietary fire alarm systems
• remote-station fire alarm systems
• fire alarm system components [NP][+]
  • fire detectors [+]
    • flame detectors
    • temperature detectors
  • smoke detectors [+]
    • ionization detectors
    • photoelectric smoke detectors
  • manual stations

Anotations

Scope note:

Electrical or mechanical systems, installed in a building that sound a blast or bell when smoke or flames are detected; certain alarms are engineered to trigger sprinkler systems for added protection.