Air balance for VAVs/static pressure

Hello all! So after listening to this podcast i think I may of had a misunderstanding regarding the correlation between static pressure and CFM.

At my work, I would be trying to balance a VAV and would be extremely short on CFM. I would stick a MAG ( positive only ) in the main air loop an get a reading of .3, and call the building engineer and tell him I have low static. He would then speed up his fan. I would take another reading and nave .9 on my MAG and at this point have plenty of CFM to complete my balance.

  So now I’m confused, why would my static pressure and CFM both go up?

thanks all

Rookie Asked on July 6, 2018 in Commercial HVAC.
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