Got two fans that are under performing.
Here is what is happening from the air balancer
1) Fans are high RPM
2) Static is 0.2" and fans are rated for .35"
3) Flow is roughly 50-60% of rated airflow
4) Motor is near the max amps.
5) Fans are single phase
Someone took the side panel off the fan and it didnt suck any air from the side. They also cut a hole in the bottom of the discharge ductwork before two square 90 elbows and a louver. No airflow through that hole.
My guess is that the hole in the outlet had more static than the two elbows and louver and that the side panel is not meant as a means to measure airflow.
BOTH fans have a round mitered elbow NEAR the fan inlet.
My suggestion is to check the fan rotation and to add some round ductwork and give the fan 3 wheel diameters worth in straight inlet duct.
Good starting point?