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Thread: Duct Static Pressure Calculation in Revit... is anyone using this?

  1. #11
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    Quote Originally Posted by Chris.kershaw View Post
    You can do that, i usual sit down with the designer at the start go through the basics for the job like where the risers are where we think the mains runs will go and whats accepable velocity in diffrent areas. Then i would start drawing like you say putting flows on grilles belmouths i dont use the sizing tool i just check it manualy as im going as ill be thinking about coord as well so i might be aware of an area with pipe crossing so ill make the duck flatter. Once ive dont a floor ill give it to the design as a colour fill drawing with velocitys and tags with flows as well as the pressure drop export. Depending on the designer they will either go into revit them self and tweek a few things or sit down with me and tell me what to change.

    i did cut a few stages out ha! I just meant in general terms of sizing duct throught revit its just from the grills on a preset parameter

    I used the duct sizing tool to help with co-ord as some intial ductwork was abit oversized to get under some beams so I set the velocity and restricted the height to what was needed and it worked well.

    do you use revit for sizing pipework? ive not even attempted it yeh is it an easy workflow and does it work well?

    cheers
    acherneva likes this.

  2. #12
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    Pipework is the same really heating and chilled you just have to make sure your flows are on your outlets, bypasses can be tricky i just created a family thats a circle with the same diamited as the pipe 1 mm think and set the connects not to flow through. Domestics is about the same bit youneed to get your head round fixture units (diffrent to what we use in the uk) only too a few hours for one of our designers to create a list of oitlets and what FU was required.

    As none of it just works with any tweaking it seems to put people off stright away when a bit of learning up front saves you days if not weeks of work.

  3. #13
    Member
    Join Date
    April 20, 2015
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    Current Local Time
    11:57 AM
    Pipework is the same really heating and chilled you just have to make sure your flows are on your outlets, bypasses can be tricky i just created a family thats a circle with the same diamited as the pipe 1 mm think and set the connects not to flow through. Domestics is about the same bit youneed to get your head round fixture units (diffrent to what we use in the uk) only too a few hours for one of our designers to create a list of oitlets and what FU was required.

    As none of it just works with any tweaking it seems to put people off stright away when a bit of learning up front saves you days if not weeks of work.

  4. #14
    Autodesk
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    November 10, 2011
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    Why they're instance parameters...

    Quote Originally Posted by josephpeel View Post
    Personally I find it really bizzare that the loss method and table settings are all INSTANCE parameters... If you could set it in the Type or in the family with formulas there would be no need for extra programs.
    After doing some poking around on this, I learned that this value is instance because the thinking is that the same fitting will have different values depending on whether it is used on the supply side or return side, and/or (I assume) exhaust, etc. That means if Revit used Type for this value, ostensibly there'd have to be a static drop type parameter for every type of system.

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