This part of BS 5446 specifies requirements and test methods for smoke alarms using scattered light, transmitted light, or ionization intended for permanent installation on ceilings or walls of dwellings for the purpose of life safety.
It also covers smoke alarms suitable for use in leisure accommodation vehicles (LAVs).
NOTE 1 Equipment conforming to this standard may not be suitable for use in boats due to the corrosive atmosphere.
NOTE 2 Although not covered by this standard, equipment is available for use with smoke alarms in order to provide a suitable warning system for use by the deaf and hearing impaired.