Battery-operated smoke alarms installed in residential multi-family dwellings built before 1987 must be replaced with 10-year sealed battery smoke alarms under these conditions: if the smoke alarm is older than 10 years, needs to be replaced for any reason, does not include a date of manufacture or the dwelling’s owners cannot prove that they have…

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CO alarms are required outside of each separate sleeping area in the immediate vicinity of the bedrooms in all newly constructed one and two-family dwellings and town homes not more than three stories. Effective date: January 2009

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Smoke alarms are generally required in residential settings. Hard-wired smoke alarms are required in all new construction.  

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