Agung Limowa

I need to see how much the air quantity and to see if the quantity is sufficient on the outlet, if i set on boundary as interior cant control the flow there. So i need to set as a fan ?, If i set as a void i'm not sure the air will flow through the duct, and cdo you have reference about fix/source cell zone? im really sorry for too much asking, i'm really new and this boundary problem seems never endsĀ