“What is the life expectancy of the Nest - Protect 2nd generation smart smoke/carbon monoxide wired alarms? Other brand dual protection units advise they last about 10 years at which time they should be replaced?”

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• It has a ten year life, it will alert you when it is time to replace.

  Answered by Mikehenrytts 9 years ago

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• Hi BG, based on Nest webpage Second generation Nest Protects have to be replaced after 10 years, while first generation Nest Protects have to be replaced after 7 years.

  I would recommend:

  • 
    Google - Nest Protect 2nd Generation (Battery) Smart Smoke/Carbon Monoxide Alarm - White

    Rating: 4.8 out of 5 stars with 3049 reviews

    4.8(3,049)

  Answered by FranPR 9 years ago

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• According to the Nest documents, there is some regulatory reason that requires replacement at 10 years. It might be related to some technical aspect of the detection sensors.

  Answered by BajaBarry 9 years ago

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• 10 years is correct, and it will actually tell you when it needs to be replaced.

  Answered by SmokingGun 9 years ago

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• It's my understanding it will operate upto 10 years, but we have only used our for 3 years so far.

  Answered by GreatG 9 years ago

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