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    biggabe's Avatar
    biggabe Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Dec 14, 2009, 10:01 AM
    Older day n night model numbers
    Have an older day n night gas/ elec roof pack about 18 years old, single phase, 4-ton, need the model number.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 14, 2009, 11:48 AM
    The model number is located on a permanent tag on the unit. There could have been more than 150 different models made of that unit over the years.
    greylilac's Avatar
    greylilac Posts: 1, Reputation: 1
    New Member
    		  
    #3

    Oct 8, 2012, 11:15 AM
    Bought a house, Furnace runs fine. Went to change the filter and there isn't one I can see. Day & Night furnace. Where should the filter be?
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