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Question:

the 15 year old hardwired smoke detector in our house beeps approx every 30 secondswhat does this mean?

I replaced the battery today with a new one. I tried the test button and the alarm goes off just like its supposed to, but like i said approx every 30 seconds it makes a short half a second beep. why?

Answer:

They are designed with a material that will reflect the light from headlights so they can be seen easier in the dark and inclement weather.
Just been told the image has been deleted. So why not delete the question at the same time?

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