Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The standard OpenStudio report is an OpenStudio Reporting measure. It doesn't have access to the GUI unit preferences, and as a result it always makes the report in IP units (this could be good feature request for user voice). The standard EnergyPlus generated html file will be in SI units, so if that contains the data you need you could use that.
Another option is to alter a copy of the reporting measure (or a sub-set of tables you care about) to always create SI reports.
