DesignBuilder IDF Import problems

asked 2024-05-13 09:33:47 -0500

adrisnnt's avatar

updated 2024-05-13 18:41:43 -0500

Good morning,

I'd like to import a .idf file that is in Relative Coordinates into DesignBuilder.

I'm conscious that DB doesn't yet support Relative Coordinates so I was wondering how to change them into World Coordinates. I've seen another post ( but I haven't been able to fully understand. I change the coordinates to World but when it comes to Zones, i'm not sure.

The import preview looks quite good ( even though there's some rectangles all over, but when I actually import it, it loses information.

Things to consider:

  • I've explored with diferent modeling conventions in the program that I use called IFC Builder. I'm taking about interior or exterior measurements, it doesn't seem to have any effect
  • I've tried different EnergyPlus versions, 9.1, 9.4 (Trying to match DB) and 23.1 and they all are the same.
  • I've tried to go through OpenStudio SketchUp Plugin and there it says some stuff have been fixed but then the same happens in DB.

Anybody has any idea?

Thank you very much!

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Hello, can you please share the idf file, so I can take a deeper look?

Tokarzewski's avatar Tokarzewski  ( 2024-05-14 03:03:42 -0500 )edit

The idf file that you provided is already using the World coordinate system and all zone objects have 0,0,0 origin point. That being said, the coordinate system is not the source of the issue.

Tokarzewski's avatar Tokarzewski  ( 2024-05-14 03:20:26 -0500 )edit

Thank you Tokarzewski, do you think where the problem might be? Thanks!

adrisnnt's avatar adrisnnt  ( 2024-05-14 03:44:01 -0500 )edit

I don't know the IFC Builder software but I would imagine that it can't export a closed-manifold geometry which is the source of the issue.

Tokarzewski's avatar Tokarzewski  ( 2024-05-14 03:50:30 -0500 )edit

May I ask with software you use to create the geometry for energyplus? Thanks!

adrisnnt's avatar adrisnnt  ( 2024-05-21 10:15:24 -0500 )edit