My building has 16 floors with a 300-ton York HVAC. I was told that our operations staff has been manually controlling the air handler supply air fan to increase airflow. I have been monitoring the system with an Alerton DDC, and have observed that when they set the SAF to 0.6", this results in a supply air static pressure of 1.8", and when they set the SAF to 0.8", this results in a SA static pressure of 2.4".

I thought the objective was to keep static pressure to a minimum. What is the point to turning on the SAF (RAF is off, RA static pressure is 0), and creating supply air static pressure? Doesn't this just make the HVAC have to work harder?

Sorry if this is a dumb question - I'm just management.