You can do a couple things:
- Create one zone with 8 spaces and one virtual terminal unit that is the sum of the 8 terminal units (assumes that they all operate together)
- Create a zone for each space and include 8 terminal units (this probably leads to longer simulation time without much of a benefit in increased accuracy)
- If the spaces are similar enough (size, usage, etc.) create one space with a multiplier, assign one zone with one terminal unit and the results will be multiplied (similar to #2 but with shorter simulation time).
