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    tsturgo8's Avatar
    tsturgo8 Posts: 4, Reputation: 1
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    #1

    Nov 21, 2008, 11:44 PM
    How do I know if my furnace uses one or two filters?
    Forgive me for asking but I am not sure if my furnace uses one or two filters?
    Which leads me to the question of placement, if just one filter is needed.
    My furnace is a coleman 7900 series gas unit (heating only) installed in a mobile home.
    One the inside of the blower housing is a number of 7945-590 not sure if that is a specific model number or not.
    KBC's Avatar
    KBC Posts: 2,550, Reputation: 487
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    #2

    Nov 22, 2008, 01:23 AM

    Although I am not a professional furnace person, I would think ONE would do,but I'll look for the model type you have and make sure.

    KBC
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