I am modeling an all-electric building. My baseline building is a system 8 PFP VAV with chillers and electric resistance heat.

We are considering adding natural gas water heaters for high dishwasher and shower loads. It does not seem like this should change the building to an electric/hybrid with the baseline system changing to system 7 with a hot-water gas boiler as the architect has suggested. The proposed HVAC heating source is still 100% electric.

Has anyone dealt with this heating source question? What was the resolution?

Thanks in advance,
Rick

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