The US National Fire Prevention Association says smoke detectors should replaced every 10 years or sooner if the don’t work properly when tested.
Here we find the age of the smoke detector and find it needs to be replaced. This is a 10 year old First Alert Smoke Detector.
You can find them on Amazon:
First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack
https://amzn.to/3NKKNlw
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comprar um site , Smoke Detector Replacement Age – New Home Owner – Tip # 001