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How Often To Replace Fire Detectors. Smoke detectors need to be replaced every 10 years,. The national fire protection association (nfpa) recommends replacing smoke alarms every 10 years.
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Remove the smoke detector from the wall or ceiling board and check from behind the manufacture date. If the date is less than 10 years then return it to its usual position otherwise replace it. Modern smoke detection systems installed in houses are placed in every bedroom and on every level.
Most of these devices last five to seven years.
Smoke detectors have an expiration date and many currently in use have exceeded their full functionality as dust has accumulated over time, desensitizing the sensors. Typically, you should replace your detectors once every five to seven years, but there’s a little more to it than that. Since you cannot (and should not) replace the lithium battery, replace the entire smoke alarm according to the manufacturer's instructions. During their lifespan, you’ll need to perform regular function tests and keep them stocked with working batteries.
