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Thread: ductulator

  1. #14
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    Quote Originally Posted by cehs View Post
    Anything for android?
    HVAC Duct Sizer by Carmel Software

    https://play.google.com/store/apps/d....hvacductsizer

  2. #15
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    Quote Originally Posted by cehs View Post
    What is: ballane89??
    Do ctrl-F for find and enter ballane89. It is a handle used by one who posted a question in this thread.

  3. #16
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    Quote Originally Posted by jimj View Post
    Yup, figure .03 for RA and SA grills/registers. And .1 for standard cheap filter ( read footnotes of system for this) and don't forget things like strip heaters and such.
    Yeah and your total friction loss should be no more than 0.5" of water. I would suggest looking into free air return as much as possible if you need to reduce the total pressure loss.

    You shouldn't go over 0.1"/100' for supply and 0.08"/100' loss for return to keep your velocities and friction losses reasonable. The Duculator is not that hard to use and it's a great tool. Thank you very much
    "I could have ended the war in a month. I could have made North Vietnam look like a mud puddle."
    "I have little interest in streamlining government or in making it more efficient, for I mean to reduce its size. I do not undertake to promote welfare, for I propose to extend freedom. My aim is not to pass laws, but to repeal them. It is not to inaugurate new programs, but to cancel old ones that do violence to the Constitution."
    Barry Goldwater

  4. #17
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    Your return air has approximately a 4 to 5 % increase in cfm and that's why you should use a lower friction factor. It's also easier in most cases to have the return duct size increased and this will help in the overall reduction in friction losses and increase the air flow accordingly. Thank you very much
    "I could have ended the war in a month. I could have made North Vietnam look like a mud puddle."
    "I have little interest in streamlining government or in making it more efficient, for I mean to reduce its size. I do not undertake to promote welfare, for I propose to extend freedom. My aim is not to pass laws, but to repeal them. It is not to inaugurate new programs, but to cancel old ones that do violence to the Constitution."
    Barry Goldwater

  5. #18
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    Quote Originally Posted by cehs View Post
    What is: ballane89??
    Uhh my user name lol

  6. #19
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    Quote Originally Posted by ballane89 View Post
    Uhh my user name lol
    Sorry, my bad. I thought it was the name of an app....
    Those who dance, appear insane to those who do not hear the music.
    Those who believe, appear ignorant to those who do not know God.

  7. #20
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    Mar 2015
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    Hi,

    I would like to design the duct through McQuay ducting software . please let me know

    1 , For Example paricular room 600 l/s
    2, Equipment type:AHU
    3,How do we calculate head loss

  8. #21
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    "I would like to design the duct through McQuay ducting software . please let me know

    1 , For Example paricular room 600 l/s
    2, Equipment type:AHU
    3,How do we calculate head loss"

    You should start a new thread for a new topic.
    You're going to need a lot more information than what you have provided.
    "Head" loss? Do you mean HEAT loss? That's yet another topic.
    Last edited by kdean1; 03-30-2015 at 03:19 PM.

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