Fan Power Limitation Pressure Drop Adjustment

Hallo everyone, I am modeling a C&S project with 8 floors, and system 7 will be used in the Baseline Case. For system 7, usually each floor shall be modeled with a separate HVAC system in Baseline. But this project has both laboratory and office areas, laboratory spaces are smaller than office spaces and are more than 20,000 ft². Two separate AHUs supply outdoor air for lab and office. Therefore according to G3.1.1 Exception (a) I made also two HVAC in Baseline building. 1) Is this correct? 2) If this solution is correct, the pressure drop adjustment for fully ducted EA system is 0.5 or 0.5 x 8 floors? 3) Is there no pressure drop because of supply air ducts? Thank you in advance!