Is there an easier way to add 100 split DX systems in a 100 unit 10 story apartment building? The model has 100 individual zones. One AirLoop HVAC system per unit. I could rezone it so that each floor, with 10 units, is one zone. What I'm not sure of is will the latter fairly represent the energy use? For example, 10 units, all using 1.5 ton HP's in one thermal zone.