You may be able do this with measures depending on system type, but HVAC system import from IDF is not a native OpenStudio feature—it's tricky to do in general and hasn't bubbled up to the dev team's list of priorities. See this [this previous question: https://unmethours.com/question/2618/can-i-import-an-entire-hvac-system-from-energyplus-to-openstudio/ question] (https://unmethours.com/question/2618/can-i-import-an-entire-hvac-system-from-energyplus-to-openstudio/)