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Originally Posted by honda99ex
I finally decided on a system but things add up fast. My issue is that I have a lot of windows and they are essentially such that I need 2 sensors per window which doubles the price... That's how the old ADT system is set up now, each window double sensors. I've read about using aftermarket flat magnets to get it to 1 sensor per window but I don't know if I want to chance it and have them read improperly... If any one can throw any insight on that front would be appreciated. I've also toyed with using just glass break sensors which would work ok in one part of the house but probably just as costly in another part... But not sure about false alarms.... And IR motion sensors. Can I or can I not aim toward at radiators/ multi splits? It seems every zone I can use a single motion sensor would eventually intersect an HVAC component.... Arg analysis paralysis
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I'm not sure about the IR motion sensors. But have heard and experienced improperly set-up glass breaks. An old house of mine had them; dogs barking, car alarms, car horns, really bad thunder would set them off randomly.
I'm assuming your window issue is that they're double hung so the top and bottom halves can open independent of one another. If this is the case you should be able to install a wireless sensor in the middle where they both meet. Or depending on how often you plan on opening them use a solid bar to force one to stay closed and only put a sensor on the other half.
I personally only have sensors on half my windows right now (back and side) since my neighborhood is always full of nosy house wives and anyone coming in through the front will be seen entering. Or at least leaving if they survive the initial encounter with the dogs.