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  1. #1
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    Jan 2017
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    Question Black around fire alarms what is this?

    0103171542a.jpg0103171542.jpg I live In Govorment apartments and i just seen this black and i went and told them and they said it was nothing and i have never seen this every and didnt think it was safe or right and i just wanted to get some information of what it is

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  2. #2
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    Hello Amanda Stewart,

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  3. #3
    Join Date
    Feb 2008
    Location
    Caledon, Ontario
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    Default Re: Black around fire alarms what is this?

    It's most likely dirty air being pulled in through the hole in the wall where the wiring comes through. Even more so if their is a void in the insulation in the wall and/or the wall is an outside wall. Air can be pulled in through such holes when an exhaust fan is run, winds, or unit is under negative pressure due to prevailing winds.


  4. #4
    Join Date
    Jan 2017
    Location
    TN
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    3

    Default Re: Black around fire alarms what is this?

    Quote Originally Posted by Raymond Wand View Post
    It's most likely dirty air being pulled in through the hole in the wall where the wiring comes through. Even more so if their is a void in the insulation in the wall and/or the wall is an outside wall. Air can be pulled in through such holes when an exhaust fan is run, winds, or unit is under negative pressure due to prevailing winds.
    thank you very much!


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