Question-and-Answer Resource for the Building Energy Modeling Community
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I generally don't comment in conversations like this because it might be perceived as 'commercial' input. But relative to the EnergyPlus airflow network and the specifics of this thread I think I'd be doing you a disservice by not mentioning that: (1) AFN modelling in EnergyPlus is widely regarded as very powerful, but also very difficult and perhaps too time-consuming for larger buildings; and (2) you are likely to find it an order of magnitude faster and easier in DesignBuilder, which also has simplified EMS tools that make that easier too. There are 3 free online tutorials on this page that will help you understand the differences between the different natvent methods available in EnergyPlus: https://designbuilder.co.uk/training/tutorials and you can find more encyclopaedic information on natvent in DesignBuilder's program help: https://designbuilder.co.uk/helpv7.0/#Natural_Ventilation.htm?Highlight=natural%20ventilation. I hope that helps!
