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  1. #1
    Join Date
    Dec 2004
    i have an air duct calculator, and in the friction section it shows ".10" is recomended residential setting, is it correct? i'm putting 2.5 ton unit (heat pump) in my house, so if i use this setting it shows like 14x12 duct to handle 1000cfm, so should i use that setting or not?thanks for all replies.

  2. #2
    Join Date
    Jul 2004
    You have asked several questions in the past and had several good answers for some reason but now its my turn. Who did you buy this system from and why would you think we should tell you everything you need to know to install it. If you are installing it you should know the answer to your question or you should have hired someone that does.

  3. #3
    Join Date
    Mar 2002
    Concord, CA
    Don't be so harsh trane. I thought we loved do-it-yersefers around here.

    Pay no mind to trane dennis_ru. All the answers you need are here, here and here.

    That last link supplies different sort of answers. But they're good ones anyway.

  4. #4
    Join Date
    Sep 2003
    Well, Dennis, you would be doing it like a lot of other contractors do. Just the same, you'll have problems like a lot of homes do. It will cost you more to have the duct fixed than to have it done right the first time.

  5. #5
    Join Date
    Nov 2004
    SW FL

    Lightbulb T.E.L. Me

    Originally posted by dennis_ru
    it shows ".10" is recommended residential setting, is it correct?
    Just make sure you have accurately determined the Total Equivlent Length ( T.E.L.) for each run.
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

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