This error was firstly reported in September, 6 months ago, 4 major releases of GBS keep it.
Zone setting for outdoor air in l/s is imported incorrectly causing 10 times more energy consumption and wrong results for alternatives...
Honestly, I'm sick and tired to fight with Autodesk "support"...
We will post an update on the Forum when this issue has been fixed.
Our apologies for the inconvenience.
The release o June 25, 2014 issue is solved by the team.
This release fixes an energy analysis conversion bug in the outside air per area setting for Revit projects using SI units.
Please see the Releasae Notes.