Modifications to the HVAC system that involve replacing the system or components require that the project be registered with a HERS provided. The simplified Addition and Alteration methods allow for no registration, and as such cannot be used in this case. Your options would be to use the Performance Approach (which will still required registration) or indicate the HVAC is not being altered, and then submit a separate document via a HERS provider (see www.cheers2016.org) for the HVAC alterations in addition to the envelope documents prepared in EnergyPro.
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