Dear Nimesh,

For baseline refer G3.1.3.13 VAV Minimum Flow Setpoints (Systems 5 and 7).
Minimum volume setpoints for VAV reheat boxes shall be 0.4 cfm/ft2 of floor
area served or the minimum ventilation rate, whichever is larger.

For proposed it depends on the Internal load of the space. For zone with
high internal load you may need to increase your CFM upto 1-1.2 CFM.Sqft.
OR you can also give direct supply CFM as per design and make sure you also
includes altitude factor in your inputs.

Thanks!