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Zone Contaminant Source or Sink CO2 Gain seems to be wrong

In my multizone Energyplus model with AFN I have no gas equipment and the Carbon Dioxide Generation Rate in the people schedule in every zone is set to 0. The only CO2 sources are ZoneContaminantSourceAndSink:Carbondioxide objects.(1 in every zone)

While the output variable values from "Contaminant Source or Sink CO2 Gain Volume Flow Rate" correspond to the input schedule (right y-axis) in the "ZoneContaminantSourceAndSink:Carbondioxide" object, the "Zone Contaminant Source or Sink CO2 Gain" (left y-axis) doesn't correspond to anything. Shouldn't it be the same as the Contaminant Source or Sink CO2 Gain Volume Flow Rate? (Because there are no other sources in the zone) I

Is this expected behavior or am I missing something?

image description

Zone Contaminant Source or Sink CO2 Gain seems to be wrong

In my multizone Energyplus model with AFN I have no gas equipment and the Carbon Dioxide Generation Rate in the people schedule in every zone is set to 0. The only CO2 sources are ZoneContaminantSourceAndSink:Carbondioxide objects.(1 in every zone)

While the output variable values from "Contaminant Source or Sink CO2 Gain Volume Flow Rate" correspond to the input schedule (right y-axis) in the "ZoneContaminantSourceAndSink:Carbondioxide" object, the "Zone Contaminant Source or Sink CO2 Gain" (left y-axis) doesn't correspond to anything. Shouldn't it be the same as the Contaminant Source or Sink CO2 Gain Volume Flow Rate? (Because there are no other sources in the zone) Izone)

Is this expected behavior or am I missing something?

image description

image description