i've modeled a zone through Design Builder and exported it as an IDF file. I can only check the co2 and fan elec on .ESO file via Energy Plus result viewer. At this point which tool should I use for optimization. I'm thinking about genopt or jEplus. After picking one, what proceduere i should follow? my variables will be ventilation rate and occupancy rate I'm new to this and need alot of help, Thanks