Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
OpenStudio definitely does not recognize HVAC components when you import an IDF. Primarily it only imports the geometry and loads. If you haven't edited the model after importing the IDF you will not have HVAC systems. The error is simply telling you it did not find any Fan:VariableVolume objects.
There are measures that can insert a generic HVAC system for you, but if you intend to keep working in OpenStudio I would recommend reviewing the imported model in OS before throwing more measures at it. Alternatively there are ways to script changes directly onto an IDF file, but I'll admit that's not my expertise.
