I want to include the effect of ventilation in my simulation. A real mechanical ventilation system does not exist yet in the building I am considering. However I want to take into consideration this effect without sizing a real system. What I only know is that I should change something here C:\fakepath\Ventilation.PNG, but I do not know what type of ventilation to choose between natural, intake etc (I do not have any information concerning fan pressure rise etc..). My purpose is to consider in what extent "ventilation" affects the cooling and heating needs of my building and so the electrical consumption without the presence of a real mechanical ventilation system.