Are there some automatic reliable measures in order to set natural ventilation and infiltrations?

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If I want to set a natural ventilation and the infiltration, instead of setting them manually with schedules, infilitrations, design flow rates, I found 2 measures : "Add Wind and Stack Open Area" and "Adding infiltration correlated for weather and building characteristics". Are there other simplified measures in order to set this kind of natural cooling loads in a very easy way?