What frequency of testing is required in residential flats?
Md Ariful Islam
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Dr. Md Rushad Rahman
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There is no international standard for that. Also, there may be flats with both an alarm system and individual alarms within each unit. Alarm systems are not always required (e.g., under NFPA 101: under 4 stories high or less than 11 units). Self-contained smoke alarms in residences should be tested according to the manufacturers' recommendations -- typically once per month. Commercial alarms may need additional annual inspection, testing and maintenance. Local rules may differ.
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