How long do wired smoke detectors last?

All smoke detectors should be replaced every ten years. If your wired smoke detector isn’t beeping or responding correctly when tested then you should replace it sooner. You should not keep any detector longer than 10 years, even if it’s still working correctly.

This is not the same as changing the batteries in your smoke detector. You should do that as soon as the alert beeping from the smoke or carbon monoxide detector begins.