Today I finally have my MX back and time to set up a digital manometer which measures in Pascals down to tenths of Pascals. I tested all three fan settings on the larger portion of the drivers seat. I am attaching a PDF with pictures showing the three fan settings and the pressure differentials at each speed. The test results are 180 degrees at variance with what I expected. I think that the results I found will be indicative of all other seat ventilation systems installed. While the test was ONLY done on my car (twice with the same results), it is safe to say that all other seats will be the same. The main reason that you cannot "FEEL" air movement is that when suction is moving air away from your hand, the perception of air movement is not even close to what you would "FEEL" if the air movement were toward your hand.