It's a wireless heat detector, literally. I had the same thing happen
years ago in an high class condo complex. Went into the living room just
away from the kitchen pulled down the smoke detector and found no wires
hooked to it no wires anywhere. Was able to snake a 4 wire from the
kitchen heat.- Hide quoted text -
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Many, many years ago, there was a company who would go door to door
residential, to install just fire alarm systems for a very low price.
If the person said yes, they'd start right then and install a local
heat detection fire alarm with a few of the old bi-metal 135 degree
heat sensors, a single zone panel and a bell. Installed in the easiest
places they could get a wire to. But, in those cases where a detector
was needed or the customer asked for it, and they couldn't get a wire
there, they'd just screw a detector to the ceiling, collect their
cash and leave. They were around for a number of years, but back then
there were no regulations of any sort. It wasn't until they were
gone, that it began to be discovered, what they'd done. Actually, the
guy died, because I remember that there wasn't any way anyone could
take any action against them.