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[EnergyPlus_Support] ZoneVentilation Volume Standard Density vary

Hello,

I have a question about the ZoneVentilation DesignFlowRate.When I set the Design Flow Rate to a constant value (assuming 0.086162 m3/s, for a single zone), I don't understand why the output variable Zone Ventilation Volume Standard Density (hourly) is varying. Can someone explain it? I have checked the settings and I have all minimum and maximum temperature setted to default value (this mean no shutoff of ventilation) , the maximum wind speed is 40 m/s (no shutoff) and only the constant term coeeficient is set to 1, the other are to 0. Of course, I have tested this setting for a single zone, without any infiltration or other air system.

Thanks in advance.

Robin GENOUD



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