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  • 10 months later...

Information Only: All of the First Alert hardware incorporate a countdown timer. Depending upon production date of the smoke / co it will have a 5-6 year service life. Meaning if the product was activated and was in use for 3 years. It will have 2-3 years left before it calls out a malfunction alert.


You will than have to purchase new units to replace the old ones . . .


Hardwired One Link smoke sensors have a 10 year service life before tripping the malfunction timer. 


The Insteon Smoke Bridge on the other hand is a good buy and no worries about an internal clock expiring.

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