I’ve run into similar questions while working on energy models in Revit. The “Building Service” parameter is more about defining the type of heating and cooling system conceptually (e.g., central air, heat pump), while the “HVAC System” parameter ties into the specifics of the project’s HVAC setup. Revit uses this data to simulate loads in workflows involving energy analysis tools, like Insight or Green Building Studio. These inputs influence heating/cooling load calculations by defining system efficiency and behavior.
It reminds me of when I had to replace an old HVAC unit at home. I called https://musiccityappliance.services/ , and they explained how system specs affect real-world performance—kind of like Revit’s focus on input accuracy for meaningful outputs.
