A presentation of 4 different cases to inspire Blower Door-test operators

In Denmark we have decided that buildings have to be tested above 50 Pa. But is that reasonable? In this case I meant that we should have brought 15 fans in, and at the test only used 2 fans. I think not, because it gives us unreasonable costs to test very large buildings. So today a lot of my work is done out from the building code, but certainly also out from my knowledge about how air tight the, concrete, contractor in generally builds. This means that in this case, where the contractor made a failure in the building, and build a leaky building, I would not have an enough fans to establish 50 Pa.