Brand
Firex smoke alarms: date, expiry and replacement
Quick answer
Firex alarms with a page on AlarmSwap, plus the Firex row from the date-and-expiry guide. Replacement and adapter details stay on the model page, each one linked to its source.
Last checked
Model pages
From the guides
Find your alarm's date & expiry · Firex
- What Kidde says
- Kidde, which bought the maker of Firex alarms in 2009, says Firex owners should replace them with a current Kidde model.1
Model pages: Firex i4618
Other brands
- Kidde Kidde model pages on AlarmSwap: where the date is, when the alarm is due, and which adapter those pages cite.
- 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 — What Other Products Will Kidde Alarms Interconnect With? 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 Spot something out of date?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.