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__AmirRoth__ 's answer (this is a bug) is correct. Here's some background for other people who run across this question. The OpenStudio versions of the DOE Prototype/Reference buildings are a work-in-progress. We released them for general use because the overall results numbers are reasonable, but there are some known and unknown differences between the OpenStudio versions and the original IDF versions that we're still working to reconcile.

Known differences:

  • The original files are in E+ 7.2 (Reference) and E+ 8.0 (Prototype) vs. E+ 8.5 for the OpenStudio models
  • Daylight sensor placement is slightly different
  • Minimum VAV damper positions are slightly different in some cases (impacts models with VAVs)
  • OpenStudio versions don't yet incorporate EMS from original IDF files
  • Infiltration for doors hasn't been added (impacts small buildings most significantly)
  • Possible minor mistakes were found and corrected in original IDF files

Unknown differences:

  • (just kidding)

If you find additional issues, please report them here.

We'd rather have false alarms than miss things, so if you find actual or suspected issues, please report them.

__AmirRoth__ @__AmirRoth__ 's answer (this is a bug) is correct. Here's some background for other people who run across this question. The OpenStudio versions of the DOE Prototype/Reference buildings are a work-in-progress. We released them for general use because the overall results numbers are reasonable, but there are some known and unknown differences between the OpenStudio versions and the original IDF versions that we're still working to reconcile.

Known differences:

  • The original files are in E+ 7.2 (Reference) and E+ 8.0 (Prototype) vs. E+ 8.5 for the OpenStudio models
  • Daylight sensor placement is slightly different
  • Minimum VAV damper positions are slightly different in some cases (impacts models with VAVs)
  • OpenStudio versions don't yet incorporate EMS from original IDF files
  • Infiltration for doors hasn't been added (impacts small buildings most significantly)
  • Possible minor mistakes were found and corrected in original IDF files

Unknown differences:

  • (just kidding)

If you find additional issues, please report them here.

We'd rather have false alarms than miss things, so if you find actual or suspected issues, please report them.