Everyone, I have an energy model that original had its cooling needs served by an electric hermetic air cooled chiller. All the chiller default values were used. That particular model is Base Rev3 (see attached files). I then replaced the chiller with a chilled water meter CM1. Once again, all the CHW meter default values were used. That particular model is Base Rev4 (see attached files). The amount of cooling the building used increased from 155 MMbtu/yr, Base Rev3, to 425 MMbtu/yr, Base Rev4. This makes no sense to me since the amount of cooling the Rev3 and Rev4 energy models required was exactly the same. I would expect the cooling energy COSTS to be different, but not the cooling energy USAGE. Anyone else having this problem and does anyone know how to fix it?

Thanks

Kathryn Kerns
Systems Specialist
BCE Engineers, Inc.
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