hi rfdesq, how do you plan to implement a residential security while making it cost effective and reliable? What type of sensors, in first floor in this case, are you thinking of recommending?
Thanks!
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Just my opinion. The first way to make a residential system cost effective and reliable is to put a switch in every door and window (assuming you are doing the labor yourself). You can purchase 10 switches for the price of one cheap PIR. It is hard to get precise angles from the diagram, but, I would place the Kitchen/Breakfast/Family Room motion sensor in the Northwest corner of the Kitchen. A 50' throw should cover that area of the house, the family room, and possibly see part of the stairway landing. I would move the dining room motion sensor to the Southwest corner, it should see the dining room, front door, part of the den, and part of the stairway landing. It will be less obvious to a bad guy who enters the front door. Remember, you want the bad guy to walk across the path of the sensor, not towards it. If the stairway is a concern, perhaps a 360 degree lookdown motion sensor at the top of the stairs rather than one dedicated to just the bottom of the stairs. In a perfect world with no monetary restrictions, a motion sensor in the Den would be nice, depending on what you plan on keeping there. A motion sensor in the garage depending on what you will keep there besides cars. Hope this helps a bit.
Thanks!

Just my opinion. The first way to make a residential system cost effective and reliable is to put a switch in every door and window (assuming you are doing the labor yourself). You can purchase 10 switches for the price of one cheap PIR. It is hard to get precise angles from the diagram, but, I would place the Kitchen/Breakfast/Family Room motion sensor in the Northwest corner of the Kitchen. A 50' throw should cover that area of the house, the family room, and possibly see part of the stairway landing. I would move the dining room motion sensor to the Southwest corner, it should see the dining room, front door, part of the den, and part of the stairway landing. It will be less obvious to a bad guy who enters the front door. Remember, you want the bad guy to walk across the path of the sensor, not towards it. If the stairway is a concern, perhaps a 360 degree lookdown motion sensor at the top of the stairs rather than one dedicated to just the bottom of the stairs. In a perfect world with no monetary restrictions, a motion sensor in the Den would be nice, depending on what you plan on keeping there. A motion sensor in the garage depending on what you will keep there besides cars. Hope this helps a bit.