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I want to add Exhaust Fan to AirLoopHVAC:DedicatedOutdoorAirSystem. This is related to my previous question.

I could add HeatExchanger:AirToAir:SensibleAndLatent to AirLoopHVAC:DedicatedOutdoorAirSystem. Exhaust Fan is　always on the exhaust side of the heat exchanger (EnergyPlus sometimes disregards it e.g., HVACTemplate:System:DedicatedOutdoorAir has Heat Recovery but does not have Exhaust Fan.), but I don't know how to add the Exhaust Fan.

AirLoopHVAC:DedicatedOutdoorAirSystem is related to the following classes:

• AirLoopHVAC:ControllerList
• AirLoopHVAC:OutdoorAirSystem:EquipmentList
• AirLoopHVAC:OutdoorAirSystem
• AirLoopHVAC:Mixer
• AirLoopHVAC:Splitter

If I add Fan:SystemModel at the end of AirLoopHVAC:OutdoorAirSystem:EquipmentList as shown below, I get a sever error.

    ************* Beginning System Sizing Calculations
    ** Severe  ** The fan placement is either first as blow through or last as draw through inAirLoopHVAC:OutdoorAirSystem:EquipmentList = OA SUPPLY FAN
    **   ~~~   ** The current position is number 4
    **  Fatal  ** getAirLoopHVACDOAS: Previous errors cause termination.
    ...Summary of Errors that led to program termination:

AirLoopHVAC, Branch and BranchList are not used for AirLoopHVAC:DedicatedOutdoorAirSystem, so I think they are unrelated. I have no clue.

I want to add Exhaust Fan to AirLoopHVAC:DedicatedOutdoorAirSystem. This is related to my previous question.

I could add HeatExchanger:AirToAir:SensibleAndLatent to AirLoopHVAC:DedicatedOutdoorAirSystem. Exhaust Fan is　always on the exhaust side of the heat exchanger (EnergyPlus sometimes disregards it e.g., HVACTemplate:System:DedicatedOutdoorAir has Heat Recovery but does not have Exhaust Fan.), but I don't know how to add the Exhaust Fan.

AirLoopHVAC:DedicatedOutdoorAirSystem is related to the following classes:

• AirLoopHVAC:ControllerList
• AirLoopHVAC:OutdoorAirSystem:EquipmentList
• AirLoopHVAC:OutdoorAirSystem
• AirLoopHVAC:Mixer
• AirLoopHVAC:Splitter

If I add Fan:SystemModel at the end of AirLoopHVAC:OutdoorAirSystem:EquipmentList as shown below, I get a sever error.

    ************* Beginning System Sizing Calculations
    ** Severe  ** The fan placement is either first as blow through or last as draw through inAirLoopHVAC:OutdoorAirSystem:EquipmentList = OA SUPPLY FAN
    **   ~~~   ** The current position is number 4
    **  Fatal  ** getAirLoopHVACDOAS: Previous errors cause termination.
    ...Summary of Errors that led to program termination:

AirLoopHVAC, Branch and BranchList are not used for AirLoopHVAC:DedicatedOutdoorAirSystem, so I think they are unrelated. I have no clue.

I want to add Exhaust Fan to AirLoopHVAC:DedicatedOutdoorAirSystem. This is related to my previous question.

I could add HeatExchanger:AirToAir:SensibleAndLatent to AirLoopHVAC:DedicatedOutdoorAirSystem. Exhaust Fan is　always on the exhaust side of the heat exchanger (EnergyPlus sometimes disregards it e.g., HVACTemplate:System:DedicatedOutdoorAir has Heat Recovery but does not have Exhaust Fan.), but I don't know how to add the Exhaust Fan.

AirLoopHVAC:DedicatedOutdoorAirSystem is related to the following classes:

• AirLoopHVAC:ControllerList
• AirLoopHVAC:OutdoorAirSystem:EquipmentList
• AirLoopHVAC:OutdoorAirSystem
• AirLoopHVAC:Mixer
• AirLoopHVAC:Splitter

If I add Fan:SystemModel at the end of AirLoopHVAC:OutdoorAirSystem:EquipmentList as shown below, I get a sever error.

    ************* Beginning System Sizing Calculations
    ** Severe  ** The fan placement is either first as blow through or last as draw through inAirLoopHVAC:OutdoorAirSystem:EquipmentList = OA SUPPLY FAN
    **   ~~~   ** The current position is number 4
    **  Fatal  ** getAirLoopHVACDOAS: Previous errors cause termination.
    ...Summary of Errors that led to program termination:

AirLoopHVAC, Branch and BranchList are not used for AirLoopHVAC:DedicatedOutdoorAirSystem, so I think they are unrelated. I have no clue.

The idf file is here for your reference.