By operating cooling and heating in each floor with an integrated Fronace A/C (Heat Pump) air-conditioning system, we reduced energy costs and carbon emissions by 60% or more by reducing existing centralized and differentiated energy costs. If the heat level of the heat is low due to the temperature difference of the outdoor air in winter, the heat of the heat pump is reduced and the heat of the heat is reduced to the surface auxiliary heating system. If the heat of the heat pump is lost below -15°C, the temperature of the outside air is changed to 100% by the furnace heating function.