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Open and Edit .idd file [closed]

asked 2016-07-06 02:43:58 -0500

leshiz's avatar

updated 2016-07-06 07:12:26 -0500

Does anyone know how to open and edit the .idd file?

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Closed for the following reason the question is answered, right answer was accepted by leshiz
close date 2016-07-06 04:25:28.263402

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answered 2016-07-06 03:01:08 -0500

Not sure what exactly you want to do, some changes are possible, others will require checking the source code as well.


  • You want to add extensible fields so that the IDF Editor doesn't crash if you have for example a ZoneList object with more than one hundred zones: that will work just fine
  • If you want to change the mix/max values accepted for a numeric field: this might not work. The source code might have internal checks to make sure your don't put out of bounds values. But it's worth a shot.

Anyways, to edit the .idd file:

  1. Locate the .idd file at the root of your EnergyPlus folder. Typically C:\EnergyPlusV8-5-0\Energy+.idd on windows
  2. Make a backup copy (just copy paste in place and rename to Energy+-old.idd) in case you make a mistake and cannot figure out how to revert back.
  3. Open it with your favorite a text editor
  4. Make your changes. Look closely at the structure of the .idd file for how to change it, it's pretty self explanatory[1]
  5. Save

[1] In the .idd file itself as well as the start of the Input/Output Reference guide at chapter IDD Conventions you have some explanation of the fields. I suggest you read that too.

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Thanks a lot! So just needed note pad to open it...

What I want is to add something to EMS sensor, cause under the EMS sensor the output variables are not there, I only see output meter. I saw on this link that the .idd need to be changed to fix it and I am trying to do it :)

leshiz's avatar leshiz  ( 2016-07-06 04:25:06 -0500 )edit

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Asked: 2016-07-06 02:43:58 -0500

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Last updated: Jul 06 '16