Kenmore Elite 21814411 airflow test

The results weren't quite as good this time around. What I really find odd is that the suction has decrease dramatically at the hose and wand from the last unit I had. the airflow is lower but similar the nozzle suction is the same. the suction at the hose with the previous model was like 90 this time around it's closer to 60, i'm pretty sure this unit is put together correctly, the only thing I can think of is that the previous one had a stuck suction relief valve.