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[EnergyPlus_Support] Airloop Error Message

Hello,

I received the following error:

* Warning ** In AirLoopHVAC AHU-B-5 there is unbalanced exhaust air flow.
   **   ~~~   **  During Warmup, Environment=SUMMERSIZINGDAY, at Simulation time=07/20 19:40 - 19:50
   **   ~~~   **   Unless there is balancing infiltration / ventilation air flow, this will result in
   **   ~~~   **   load due to induced outdoor air being neglected in the simulation.


I do have infiltration air going into the zone so is this warning okay to ignore?  I specified the flow rate in my system and I do not have any return fans.  I am also getting a maximum iterations error for my Airloop.  I think these are connected.  Has anyone run across this problem?  Thank you.



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