I could get a little advice if possible.
I did the draft of a script that will take take elements from the ventilation with selection, take their surfaces and calculate surface area (Select model elements—Elements Faces—Surface Area—Math Sum). However, I cant think of a way to get rid of the surfaces where ducts are connected between themselves with connector elements.
I would say that it is possible to define a parameter which can incorporate those surfaces and then with it, in Dynamo subtract it from overall surface area.
Maybe someone has some other idea?Can it be solved by subtracting surfaces with some orientation filter?