Facility Total HVAC Electricity Demand Rate and IdealLoadsAirSystem

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Hi there,

I have an IDF that uses IdealLoadsAirSystems (in multiple zones). I read that the electric energy of these systems is not measured. What measurements is "Facility Total HVAC Electricity Demand Rate" giving me then?

I am trying to optimize the energy consumption. Do I look than rather on the "Heating:EnergyTransfer" metric? Is it even possible to optimize energy consumption when having IdealLoadsAirSystems?

Thanks for your help!