Fire detection and fire alarm devices for dwellings - Specification for multi-sensor fire alarms using any combination of smoke, heat and carbon monoxide sensors
Overview
  1   Scope
  This part of BS 5446 specifies requirements and type test methods for multi-sensor fire alarms, using one of the following combinations of sensors:
  
    
      
        
          a) smoke and heat;
      
      
        
          b) smoke and carbon monoxide;
      
      
        
          c) carbon monoxide and heat; and
      
      
        
          d) smoke, carbon monoxide and heat.
      
    
  
  It is applicable to multi-sensor fire alarms intended solely for permanent installation on ceilings or walls of dwellings, and to multi-sensor fire alarms suitable for use in leisure accommodation vehicles (LAVs).
  It is not applicable to multi-sensor fire alarms incorporating ionization smoke sensors.
  
    
      NOTE 1 Equipment conforming to this part of BS 5446 might not be suitable for use in boats used as a means of accommodation on inland waterways, due to the corrosive atmosphere.
  
  
    
      NOTE 2 Although not covered by this part of BS 5446, equipment is available for use with multi-sensor fire alarms to provide a suitable warning system for use by deaf and hard of hearing people (see BS 5446‑3).
  
  
    
      NOTE 3 This part of BS 5446 does not cover the requirements for devices intended for incorporation in fire detection and alarm systems (see BS EN 54‑1).
  
  
    
      NOTE 4 This part of BS 5446 does not include detection of carbon monoxide as a toxic gas (see BS EN 50291‑1).
  
  
    
      NOTE 5 This part of BS 5446 does not include detection of fire using heat only (see BS 5446‑2).