To limit the probability that the performance of smoke alarms will fall significantly below expectations in a fire situation, which could lead to persons not being properly notified of the fire, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
To limit the probability that a fire will not be detected in dwelling units, sleeping rooms, ancillary spaces or common spaces not in dwelling units in houses containing secondary suites, which could lead to persons not being promptly notified of the fire, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.