A showcase on the booth of Isocell. Left below blows a hair dryer air into the show case. The left side is filled with Isocell, the table-tennis ball remains down.
The air streams on the right side with stone wool out of the showcase and lifts the ball upwards. The clear message from the experiment: It's more easy to come through the blower door quality test when the house is insulated by Isocell.