How to find your actual model number and date of manufacturing: If you look at the back of the alarm, you will see where the text is split into two columns, with text on the left and text on the right. The model is the text on the top of the left hand column after "Model." The date of manufacturing is stamped on the back of the alarm in blue or black ink and it will give you the year, then the month, and then the day.
How to replace your Firex® smoke alarm: Many Kidde smoke alarms are compatible with Firex alarms. Visit the Firex compatiblity guide for more information. Firex alarms are no longer sold in Canada. In the U.S., the fastest way to find Firex smoke alarms is to use a search engine and enter 'Firex' and the part number (see instructions).
How to replace your Firex® carbon monoxide alarm or smoke/carbon monoxide alarm: Firex® branded carbon monoxide and smoke/carbon monoxide combo alarms have been discontinued. To find similar products, please visit Kidde’s carbon monoxide alarm catalog.