Does NaturalGas:Facility include gas used for service hot water?

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I have noticed when modelling a gas-fired heating system that the 'Heating:NaturalGas' meter and 'NaturalGas:Facility' meter are equal across the simulation. The service hot water is also fed from the same system and is non-zero.

Can anyone confirm that 'General:WaterSystems:PlantLoopHeatingDemand' meter is included in 'Heating:NaturalGas'?