Re: PIRs for house with ceiling heating & cooling vents and "pets"!

["alarman" <thatsallfolksl@xxxxxxxxx>]

eddy wrote:
> I recently had an alarm system installed, consisting of a NX-16 panel,
> magnetic reeds on all doors and DSC encore PIRs in the main living
> areas. The PIRs, according to the installer are immune to small pets.
> In my case the pets consist of one 12kg Cavalier King charles spaniel
> who spends all his time sleeping and a 8kg, 15 year old cat who sleeps
> even more! Then there are the 2 Roomba discovery automatic vacuum
> cleaners, dinner plate size gadgets who run around the house at
> regular intervals sucking up debris.
>
> However, it was not this collection of pets who appear to have caused
> the problem. I also have heating and cooling ducts in the ceiling
> because the house is all on one level and built on a concrete slab. At
> the moment, because it's still early spring here, the heating
> occasionally comes on at 6.30pm. Because I sometimes get home only
> after 7.30pm, the heating has been running for around an hour. Over
> the last 8 weeks, practically every PIR in the house has falsed at
> least once after 6.30pm. Some of the heating ducts are within 3 ft of
> the PIR.
>
> To be absolutely sure, I have actually "banished" the pets from the
> house, but the false alarms still continue.
>
> To make matters worse, even if I did disable the timers that operate
> the thermostat, my heating unit is a ceiling mounted model which has a
> fan controller that is triggered by the ambient temperature inside the
> unit. In days that are hot enough, the heat in the roof is actually
> high enough to trick the fans into coming on, which in turns causes
> warm air to circulate into the house. And this has caused at least one
> false alarm ...
>
> In a situation like mine, are there PIRs which are capable of handling
> the disturbance from the heating ducts, or is the only option to have
> the PIRs removed from the security system ?
>
> rgds, Ed

The PIR's were installed (located) incorrectly by an inexperienced
installer. They need to be relocated away from the heatong ducts, or at the
least, replaced with dual-technology units. Who did the install?

--
js

- The bigger they are, the harder they fall.
( Also, the harder they bite, punch, and kick.)