"Dave Platt" wrote in message ...


Most of what I see on the Net says that replacing smoke detectors
after 8-10 years is recommended.

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I agree in principle. However, this past Wednesday, we cooked hamburgers in
the kitchen. One of two side-by-side smoke detectors in the hallway (~20
ft) went to alarm. The one that didn't alarm is three years old. The one
that did alarm was bought in 1978. I remember the year because I bought it
for my barracks room while I was still in the Navy. 37 years and still
kicking. I buy it a new battery every year on my birthday -- sort of a
reverse present.

Based on failure data, an 8 - 10 year replacement cycle may be advisable but
they do last longer.

"Sal"
(KD6VKW)