There are three common types of commercial HVAC systems: multi-split system, VRV, and CAV system. From all these, the Variable Refrigerant Volume (VRV) system offers more value for your money. The reason is it uses refrigerant as the primary cooling element and delivers the best performance.
Besides performance, you may also look for a solution that can cover your entire office building. VRV has a single condenser that supports multiple evaporators. Thus, you can implement it all over your medium or large commercial space.