I am working on an CI for Retail project. The Retail space will be included in an shopping mall and is three floors high. We have got one exterior fassade over all three floors (south), all others are orientated to the interior of the shopping mall. The whole project is conditioned via one own VAV with active controls (CO2 sensors). Private offices and teakitchens in second floor are separately controlled.
Now it is unclear if it is possible to fulfill the requirements for zoning. The main retail space is one big area on the ground floor connected to an other big retail area on the first floor with no room high partitions in the space.
Can you please give me an advice if one zone for ground floor and one for first floor is enough or if it is even not possible to earn this credit there?!

Thank you in advance