“Typically you must replace carbon monoxide detectors after a certain amount of years. Do I ever have to replace the NEST unit?”

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• Yes just like most detectors they have a 10 year lifespan. It has something to do with the way the Nest uses chemicals materials to detect.

  Answered by WakChad 5 years ago

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• You should not have to replace this unit.Ask google if there is a guarantee..

  Answered by Leeb 5 years ago

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