Originally Posted By: drakino
Smoke detector recommendation from fire marshals citing the 10 year recommendation:
https://www.firemarshals.org/rfsi/smokealarmfacts.html

10 years seems to have been picked based on historical failure rates.


That's why they have a "test button". We have three smoke detectors here, all of which are 25-30 years old, and all of which still detect burnt toast just fine.

Cost was about $15 each at the time.