power of the air-conditioning system ( Fig. 10). (1) For the geothermally assisted heat exchanger: The building’s semiannual averaged electricity expense was NT$1,559,559, where the air-conditioning system contributed 30%of the expense, which wasNT$467,868, and the air-host contributed 60% of the expense of the air-conditioning system, which was NT$280,720. (2) For the boiler air-conditioning system:
The total electricity expense of the building: