jb-eye Posted October 25, 2004 Share Posted October 25, 2004 I read a post recently about not sitting a PIR facing Windows little embarrassed but i didn't know this. I understand the white light and direct sunlight thing. But where does it say i cant place a PIR facing windows. I have them everywhere without FA. Irealy need to know if im going to stop. Jef Customers! Link to comment Share on other sites More sharing options...
Mark Pitts Posted October 25, 2004 Share Posted October 25, 2004 Hi Jef, It's more of a guideline than a rule. In general the problem comes from direct sunlight or car headlights shining through the window and hitting the PIR rather than the window itself. The ideal "recommended" position would normally be with the PIR mounted internally on an outside wall facing into the room, so that the zones terminate on furniture or internal walls. Of course this is not always possible and there are certainly many installations that do have PIRs facing windows without any problems. A north facing window with a garden outside will be less of a problem than a south facing window with a busy road junction outside. If there is a chance that sunlight or car headlights could hit the PIR and there is nowhere else to site it then a dual-tech will be a better option. Of course if a window is particularly drafty then that could also lead to false alarms if a PIR is pointing at it. For conservatories I would generally recommend using a dual-tech, and again if possible face it towards the building in a position where white light cannot hit it. As for your existing installations, if they are not causing any problems I certainly wouldn't worry too much about changing them. But for future installations if you can avoid windows in the coverage area then it could only be a good thing. Hope this helps. Mark Link to comment Share on other sites More sharing options...
jb-eye Posted October 25, 2004 Author Share Posted October 25, 2004 Mark 29170[/snapback] Many thanks for a prompt answer, will cary on installing as normal then. Much appreciated Jef Customers! Link to comment Share on other sites More sharing options...
Guest Peter James Posted October 25, 2004 Share Posted October 25, 2004 I point dets at windows all the time without fas Jef Pete Link to comment Share on other sites More sharing options...
Guest livewire Posted October 25, 2004 Share Posted October 25, 2004 I thought additional idea of PIR not facing windows was to hide them from potential burglars view too, but I might be wrong? Link to comment Share on other sites More sharing options...
bellman Posted October 25, 2004 Share Posted October 25, 2004 I point dets at windows all the time without fas JefPete 29175[/snapback] I NEVER face them at windows, white light filter or not. Regards Bellman Service Engineer and all round nice bloke ) The views above are mine and NOT those of my employer. Link to comment Share on other sites More sharing options...
Service Engineer Posted October 25, 2004 Share Posted October 25, 2004 I point dets at windows all the time without fas Jef Me too, I think that this white light and car lights problem is hardly relevant to any detector made in the last 10 years, they all have white light filtering as standard now. It shouldn`t be a problem. ........................................................ Dave Partridge (Romec Service Engineer) Link to comment Share on other sites More sharing options...
Brian c Posted October 25, 2004 Share Posted October 25, 2004 Yup, agreed. As far as I'm aware, PIR's will only FA due to sunlight if hit directly by sunlight. There are thousands of shops with full glass fronts with PIR's that don't FA. Conservatories are generally fitted with Dualtechs dur the the extreme heat more so than the direct sunlight, Ithought. If you don't know......ask. Link to comment Share on other sites More sharing options...
Adi Posted October 25, 2004 Share Posted October 25, 2004 I try and face the detector inwards if i can but not always possible due to room layout, radiators ect, but every decent detector nowadays has a white light filter and seems to me that it does its job. I really can't be ar**** with it anymore. Link to comment Share on other sites More sharing options...
Nova-Security Posted October 25, 2004 Share Posted October 25, 2004 Always pointing at windows, thats where the scrot gets in, never had a problem with RX40. Alot of this comes from the days of microwave detectors that could pick up through glass and it stuck. Anybody had a observation from the NSI / SSAIB for the siting of a detector other than installed in the rear left when its the rear right, Rich Jeff.....now youre posting early. www.nova-security.co.uk www.nsiapproved.co.uk No PMs please unless i know you or you are using this board with your proper name. Link to comment Share on other sites More sharing options...
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