Smoke alarms should be replaced every 10 years because their sensors degrade over time, reducing their effectiveness. To find your specific replacement date, check the “Replacement Date” or the manufacturing date on the alarm’s label.

Main Reasons to Replace a Smoke Alarm

Sensor Degradation: Over time, a smoke alarm’s sensor becomes less sensitive and may not detect smoke as quickly as it should.
Battery Life: Even with new batteries, a beeping alarm may indicate the device itself is aging and needs to be replaced.
Manufacturer Recommendations: Most manufacturers recommend replacing both corded and battery-powered devices after 10 years of use.

How to Find a Smoke Alarm Replacement Date

Check the Label: Look for the “Replacement Date” on the back or side of the alarm. Some labels may have the manufacturing date, which you can use to estimate the replacement date.
Regular Testing: Even new alarms should be tested monthly to ensure they are working properly.