In some instances (see RefrigeratedWarehouse.idf in E+ example files), the RefrigeratedWarehouse.idf) Electricity:Building meter can include Refrigeration (fan, heater, defrost energy consumption for Refrigeration Zone Air Chillers) in addition to too, not just internal loads loads. It seems like lighting and equipment. In the case of RefrigeratedWarehouse.idf, Refrigeration is metered separately from HVAC energy.energy (for space conditioning).