district heat pumps

Two buildings (“building A” and “building B”) are on adjacent sites. The project team wants to achieve two different LEED NC certifications. The buildings are heated by the same geothermal heat pumps, which are in building A. The heat pumps are 4. One produces hot water throughout the year (it's necessary to heat the domestic hot water), while the other ones produce heated water during the winter season and cooled water during the summer season. The document “Treatment of District or Campus Thermal Energy in LEED” states that “when the building housing the thermal energy plant is itself seeking LEED certification (…) Performance method: The district energy equipment shall be modeled as upstream equipment”. I would like to use option 2 “Aggregate Building / DES Scenario”. 1. Table 4 of the document “Treatment of District or Campus Thermal Energy in LEED” states that for the proposed model a “Virtual on-site hot water or steam boiler representing upstream DH system” shall be considered. At least for building A, wouldn't modeling the geothermal heat pumps explicitly be more accurate? Consider that the effective performance of heat pumps depends on the real conditions in which they work and also during the winter season the efficiency (COP) is higher than 1. 2. As for the baseline model, I don’t know if I understand correctly the Table 4 of the document “Treatment of District or Campus Thermal Energy in LEED”. I would follow the normal procedure: the conditioned floor area is 2882 m2, the conditioned floors are three, the heat is provided by electricity (heat pumps), therefore I would model System 6 - Packaged VAV with PFP boxes. Any advice, please? Best Regards