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ASHRAE ECB Heat Source for DOAS with terminal WSHP

Hello,

Quick question for the community, has anyone dealt with selecting a baseline system using section 11 of ASHRAE when the proposed system type is a DOAS (with gas-fired coils for tempering ventilation air) and terminal WSHP.

Section 11.5.2 j. states that systems with mixed fuel heating sources, a primary and secondary system can be modeled with the appropriate heating source type. Should i map the ventilation system with fossil fuel, and the space heating and cooling system with heat pump? I think this essentially makes my baseline system identical to the proposed (DOAS with gas coil for tempering ventilation air and terminal WSHP)

Thanks,