In article ,
Nightjar wrote:
Many won't take on one installed by another security company, let alone
a DIY set-up. It is also of an age when detectors may start to fail,
which they won't want to risk.

Eh? I've not had to replace a PIR sensor at all on this home installed
system which is more like 15 years old. What fails in them?

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*Why is it considered necessary to screw down the lid of a coffin?

Dave Plowman London SW
To e-mail, change noise into sound.