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DOE prototype OS 1.6 vs EP 23-1 discrepancies

asked 2023-08-16 08:53:05 -0500

Moe B's avatar

updated 2023-08-16 09:10:53 -0500

Hi, Beginner here and I am running DOE models (medium office in Buffalo) in EP and in OS for validation purposes and getting different End Use values for cooling heating etc.. Errors can be up to 10%. When I run the models as is, errors are only 1-3%. But I am changing U values and SHGC of windows in both software and comparing that is when the error gets higher.

In OpenStudio I am using the Prototypes from the BCL measure. While in Energy Plus I am using the corresponding IDF files from Is that what is creating the discrepancies? and what would be the best way to reduce those errors?


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answered 2023-08-30 17:00:46 -0500

updated 2023-08-30 17:01:25 -0500

The BCL measure prototypes are not intended to represent the DOE/PNNL .idf prototypes, as explained in the openstudio-standards documentation. The BCL measure will be deprecated and replaced with a measure to create "typical" buildings to help clarify the distinction.

The method you use depends on your use case:

  • Code comparisons and determinations under the Energy Policy Act -> use the DOE/PNNL .idf prototypes

  • All other use cases -> use the typical building models / OpenStudio measure to create typical buildings

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Asked: 2023-08-16 08:53:05 -0500

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Last updated: Aug 30 '23