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The Ideal Load Air system template object is similar to a black box that is attached directly to a zone. This black box can provide heating and cooling in order to meet the zone's demand. To answer your questions:

• The heating and cooling required are reported as district heating and cooling use, since the "black box" isn't connected to any plant loops
• The heating and cooling is provided at PERFECT EFFICIENCY, so you can't change the COP

This object is intended to be used for sizing purposes, so that the modeler can see required capacity and other parameters in order to select "real" equipment to simulate that will meet heating and cooling demands. If you want to specify COP, you'll need to simulate a VAV system using other EnergyPlus objects.

You can find more info about the Ideal Load Air system in EnergyPlus here and here.