The answer to 'how long does smoke detector last' is that most smoke detectors have a lifespan of 8-10 years. Smoke detectors contain internal components that gradually wear down over time, reducing their ability to reliably detect smoke and fire. It's recommended to replace smoke detectors every 8-10 years to ensure they are functioning properly and providing adequate protection for your home.
Regular testing and maintenance of smoke detectors is also important. Smoke detectors should be tested monthly to ensure they are working, and the batteries should be replaced twice a year. Properly maintaining your smoke detectors will help extend their lifespan and ensure they are ready to alert you in the event of a fire.