How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manfuactured and modular homes
What is the average life expectancy of a combination smoke and CO carbon monoxide detector?
Saturday, June 6, 2020
How long does a combo smoke/CO alarm last?
The life expectancy of a combo smoke/CO alarm varies from 5 to 10 years, as rated by manufacturer, with newer models having a longer life. Fortunately, smoke/CO alarms manufactured after August 1, 2009, are required to have an “end of life feature” that notifies you by persistent chirping when it is time for replacement. To learn more about the end of life feature, go to our blog post Why does my CO alarm (carbon monoxide) keep chirping after replacing the battery?
Here’s a bar graph comparing a combo smoke/CO alarm life expectancy to other home technologies.
Go to our blog post What is the average lifespan of the parts of a house? for rating of other house components. To understand the basis, potential use, and limitations of lifespan ratings, see How accurate are the average life expectancy ratings of home components? Are they actually useful?
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Here’s links to a collection of some of our other blog posts about “SMOKE AND CO ALARMS":
NOTE: These life expectancies are based on data provided by InterNACHI, NAHB, FannieMae, and our own professional experience. Because of the numerous variables that can affect a lifespan, they should be used as rough guidelines only, and not relied upon as a warranty or guarantee of future performance.
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