How often should smoke detectors installed in single family dwellings be replaced?

Smoke detectors installed in single-family dwellings should typically be replaced every 10 years. This recommendation is based on the effectiveness of smoke detectors; over time, the sensors can degrade and become less reliable. Replacing them every decade helps ensure that they function properly in the event of a fire.

In addition to this time frame, it's also important to regularly test smoke detectors monthly and replace the batteries at least once a year, if they are battery-operated. Many modern smoke detectors are equipped with sealed lithium batteries that last up to 10 years, implying a closer relationship between battery life and detector replacement time.

This guideline is supported by various fire safety organizations, including the National Fire Protection Association (NFPA), emphasizing the importance of maintaining functional fire detection systems in homes to enhance safety.