how to calculate air flow, pressure and temperature of the air gap of a naturally ventilated double pane window using energyplus?

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i want to simulate a naturally ventilated double pane window using energyplus. it is a single zone building having both inside and outside opening at upper and lower position of window to control the air flow passes through window air gap. in that case how can i calculate the air flow rate, pressure and temperature of the air gap of window?