And.....
I just put up a couple of those 10 year ones, but my old one still was the
only one to go off when my gardeners ran past my open door with a petrol
Strimmer, I guess it was the pollution coming out of that thing that set it
off, but nothing from the others. I'm told you can test them with a candle
about a foot or so below them, but I'd not trust myself with such a thing!

Brian

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"jon" wrote in message ...
Had new smoke alarms and heat detector fitted yesterday, with radio link
for synchronising operation.