Adding FanVariable to VAV Air Terminal Unit


I am having hard time modeling VAV with Reheat Coil that contains Variable Speed Fan(Variable Volume Fan) inside. For the EnergyPlus input class is as follows:( AirTeriminal:SingleDuct:VAV:Reheat:VariableSpeedFan)

single_room2.3dm (30 KB) (70.0 KB)


I tried several tries:

  1. merging with heating coil and inputting to AirTerminal Input.
    ->error occured

  2. tried to put Variabl Fan into Euipment input.
    ->Simulation Runs without any problem, but when opened in OS the Variable Fan Doesn’t show up…

Is there any possible way to put VariableVolumeFan into AirTerminal Unit?

Thank You!!

Hi @Jae

It seems AirTeriminal:SingleDuct:VAV:Reheat:VariableSpeedFan doesn’t exist in OpenStudio. Can you use SFP or PFP instead?

OpenStudio:model: OpenStudio Model - OpenStudio SDK Documentation

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@MingboPeng Thank you for great suggestion! SFP and PFP would work fine for me.

Thanks!!! :slightly_smiling_face:

Hi Mingbo,

I tried connecting PFP / SFP w/ a variable fan to achieve pressure reset in my case. But it seems like both the components accept constant vol’ fan only. Any advices on that?

Thanks in advance!

Hi @BH, yes, you can only use a constant volume fan for these two terminal boxes.

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