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The smoke detector is mandated by legislation in a lot of places. The premise being it can break, you don't know, and thus die.

Not a fan of LEDs, but I at least understand why this as it is.

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I had the tenant before me install fake fire detectors once. Always a green flash every few seconds but that was the only electronics in there. I only noticed because after a few years, I never had to change the batteries, so I decided to check them.

When you move into a new place, always check they are real and work.

New anxiety source: not that I will move into such a situation as yours, but that I do so and not remember to check.

Also, shake the ABC fire extinguishers. The powder can clump in the bottom of the cylinder. Or replace them if they're 15+ years old - the local fire station will take them to use in their training classes.

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