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You can connect a ZoneHVAC:TerminalUnit:VariableRefrigerantFlow as a supply component on an AirLoopHVAC (since v9.3), and in OpenStudio v3.2:

require 'openstudio' m = OpenStudio::Model::Model.new ahu = OpenStudio::Model::AirLoopHVAC.new(m) tu = OpenStudio::Model::ZoneHVACTerminalUnitVariableRefrigerantFlow.new(m) tu.addToNode(ahu.supplyInletNode)

You can also use the AirTerminalSingleDuctInletSideMixer to deliver air directly from an air loop to the inlet of a zone VRF terminal. Some sample code to do that in OpenStudio is shown in this issue, which has been fixed in v3.2: https://github.com/NREL/OpenStudio/issues/4288.

You can also add a VRF terminal to the newish AirLoopHVAC:DedicatedOutdoorAirSystem, which can pre-treat outdoor air to supply multiple other AirLoopHVACs, though I've found some odd results with that system setup.

You can connect a ZoneHVAC:TerminalUnit:VariableRefrigerantFlow as a supply component on an AirLoopHVAC (since v9.3), and in OpenStudio v3.2:

 require 'openstudio'
m = OpenStudio::Model::Model.new
ahu = OpenStudio::Model::AirLoopHVAC.new(m)
tu = OpenStudio::Model::ZoneHVACTerminalUnitVariableRefrigerantFlow.new(m)
tu.addToNode(ahu.supplyInletNode)

You can also use the AirTerminalSingleDuctInletSideMixer to deliver air directly from an air loop to the inlet of a zone VRF terminal. Some sample code to do that in OpenStudio is shown in this issue, which has been fixed in v3.2: https://github.com/NREL/OpenStudio/issues/4288.

You can also add a VRF terminal to the newish AirLoopHVAC:DedicatedOutdoorAirSystem, which can pre-treat outdoor air to supply multiple other AirLoopHVACs, though I've found some odd results with that system setup. setup.