I ran across the [EMS Application Guide:
http://apps1.eere.energy.gov/buildings/energyplus/pdfs/ems_application_guide.pdf] and it looks like we would need to create a custom software application to implement a custom heating/cooling strategy. Is there a less invasive / simpler way to accomplish the same goal? If not could you point us to a sample EMS application, preferably one that implements an active heating/cooling strategy.