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SESK: Stuff Everyone Should Know · sesk.info/dad-smoke-replace-10-years

How often should you replace the whole smoke alarm unit?

Every 10 years, or per the maker's instructions.

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  1. Every 2 years
  2. Every 25 years
  3. Every 10 years, or per the maker's instructions ✔

Why: Ready.gov says to replace the entire smoke alarm unit every 10 years or according to the manufacturer's instructions. Sensors wear out over time.

Huh, didn't know that: In smoke, Ready.gov says to drop to the floor and crawl low to your exit.

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What kind of bug can tell time? A clock-roach.
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References

Answer: Every 10 years, or per the maker's instructions. Ready.gov says to replace the entire smoke alarm unit every 10 years or according to the manufacturer's instructions. Sensors wear out over time.

  1. Ready.gov: Home Fires www.ready.gov/home-fires
    Replace the entire smoke alarm unit every 10 years or according to manufacturer's instructions.
    Checked 2026-10-10.

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