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How to downgrade the E+ model to an older version?

Hi,

We want to rezone an E+ model in Sketchup. The current version of this model is 9.0. We only want to divide a large zone of this model into some smaller ones, and do not want to lose any other information in this process. We have already added the HVAC systems, internal loads, and some other objects to this model and these things work really well.

But the problem is that:

A. If we work with OpenStudio Plugin for rezoning, we will lose some information in this process since some objects will not be translated.

B. If we work with Euclid, its updated version is only compatible with E+ 8.7.

Thus we were wondering whether there is a way we can downgrade the E+ model to version 8.7, or do you have any suggestions on rezoning the 9.0 model with a lot of existing non-geometry objects.

Thanks

ZPANG's avatar
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ZPANG
asked 2019-03-26 15:49:21 -0500
Aaron Boranian's avatar
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Aaron Boranian
updated 2019-04-09 17:41:32 -0500
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2 Answers

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Hi, sorry if I'm late on this one.

I usually do more or less do the following:

  1. Duplicate FileA.idf
  2. Open FileA-duplicate.idf in SketchUp, accept the loss of information and make the changes.
  3. Upgrade FileA-duplicate.idf to 9.0
  4. Pass both files through the IDFFileEditor.exe to re-order the syntax.
  5. Open both files using a diff comparator (vimdiff, FileMerge, ...), and copy/replace everything related to both geometry and zones from FileA-duplicate.idf to FileA.idf.
gus's avatar
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gus
answered 2019-04-09 16:37:37 -0500
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Thanks a lot! this method works well.

ZPANG's avatar ZPANG (2019-04-23 20:46:54 -0500) edit
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It would probably be best to isolate just the geometry and save it as a separate idf file to edit within Euclid. The only difference in the geometry objects between v8.7 and v9.0 is the Shading Control Name field in the Fenestration object, which was removed in v9.0. You could add this field in, open it in Euclid to make changes, then either use the idf updater or remove the Shading Control Name field for compatibility with v9.0.

ericmartinpe's avatar
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ericmartinpe
answered 2019-04-23 09:31:49 -0500
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Hi Eric. Thanks for your comment. This method did work. BTW, it seems that bigladder is updating the Euclid plugin and hopefully it will support E+ v9.0 very soon.

ZPANG's avatar ZPANG (2019-04-23 20:48:57 -0500) edit
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Great, I'm glad that worked out! Yes we are updating Euclid and will push this out soon.

ericmartinpe's avatar ericmartinpe (2019-04-24 10:17:55 -0500) edit
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