Brand
Kidde smoke alarms: date, expiry and replacement
Quick answer
These are the Kidde alarms with a page on AlarmSwap, plus the Kidde notes from the date-and-expiry guide. Every fact on those pages links to Kidde, NFPA, USFA or CPSC.
Last checked
Model pages
From the guides
Find your alarm's date & expiry · Kidde
- Where the date is
- Stamped on the label on the back of the alarm.1
- How long it lasts
- Smoke and heat alarms: replace every 10 years. CO and combination smoke/CO alarms: every 7–10 years, depending on the model.2
Model pages: Kidde i12060, Kidde i12040
Other brands
- Firex Firex model pages on AlarmSwap, including the replacement and adapter facts cited from Kidde for these alarms.
- First Alert / BRK Where the date-and-expiry guide says First Alert prints the manufacture date, and when it says to replace the alarm. No First Alert model page yet.
Sources
- Kidde — How to Find the Date of Manufacture on an Alarm checked 2026-10-31
- Kidde — Alarm Replacement Guide checked 2026-10-31
Facts are restated in our own words. If a source page changes, the "checked" date tells you how fresh our reading is. Spot something out of date? Open an issue on GitHub.