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Thread: sizing ducting

  1. #1
    Join Date
    Mar 2008
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    sizing ducting

    I am installing a fg6tc120cvcb with a 2stage 5 ton heat pump in a 3 story 4300 sq. ft. house.I have 34 suppy air register.The fan pump out 1870 CFM.Should I down size the run the supply lines to 5 in.1870/34 =55.Questioning my Hvac contractor.
    Last edited by Brian349; 03-25-2008 at 11:36 PM.

  2. #2
    Join Date
    Sep 2007
    southern IN
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    Do you have any idea what you are doing? From your post I can't for the life of me figure out what you are asking
    The first man gets the pearl, All the second gets is the shell

  3. #3
    Join Date
    Feb 2008
    Western NC
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    NO DIY here. Call a contractor to supply your needs.

    If you are a contractor, do a proper heat load calc using manual J and then duct design per manual D.

    We can't answer a question like that here.

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