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You have selected an HVAC System that is a Combined Hydronic System, which can only be modeled by the CEC CBECC engine if the heating boiler is not a Heat Pump. In this case you are using a Heat Pump for the boiler and this cannot be modeled.
The approach to model an Electric boiler or Heat Pump Water Heater that provides space heating is to treat it as an electric space heater, and indicate no ducts. This is a CEC rule, not a program limitation, so you should consider an alternative system.
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