what is the correct input for natural night ventilation ?

edit

when simulating natural night ventilation by only opened window for office building in energyplus i use : Zone Ventilation: Design flow rate ( for single sided window : calculation flow rate as Q=0.025 AU where A: effective open window area , U : average windspeed for my city ) + using Airflow Network : simulation control i am getting a big difference in zone temperature between (with and without NV) but i am not sure if these two inputs are enough
is there any other parameter i should add ??