Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
EMS is used to change building values during the simulation (e.g., look at a value calculated during one timestep and change some other property during that same timestep), but it sounds like you simply want to make an adjustment to the autosized equipment capacities?
If so, one option is to change the Fraction of Autosized Cooling Design Capacity and Fraction of Autosized Heating Design Capacity fields in the Sizing:System object.
You may also be interested in a new feature HP sizing feature developed by @rraustad coming in EnergyPlus v25.2 (due out by the end of the year) that adds a new Maximum Heating Capacity To Cooling Capacity Sizing Ratio field to the Sizing:System object.
