Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Can you specify what the y-axis is in your graph above?
The ideal air loads component, as defined in the InputOutput reference:
This component can be thought of as an ideal unit that mixes air at the zone exhaust condition with the specifed amount of outdoor air and then adds or removes heat and moisture at 100% efciency in order to produce a supply air stream at the specifed conditions. The energy required to condition the supply air is metered and reported as DistrictHeating and DistrictCooling.
I think what's going on is you are looking at energy, and the IdealAir loads system just reports the direct energy needed to heat or cool the air, i.e. COP = 1. All your other systems probably have COP > 2 for cooling.
