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EnergyPlus HVACTemplate:System:Unitary and HVACTemplate:System:UnitarySystem both can be used to model a split system or a rooftop system. HVACTemplate:Zone:PTAC is intended for a non-split through-the-wall type of system, but it can also be used. All three of these systems model essentially the same set of components and can apply to split systems or rooftop systems given appropriate efficiency and fan pressure inputs.