Maximum evaporating temperature setting values and minimum evaporating temperature setting values in an indoor heat exchanger and a ventilator cooler are determined in accordance with outdoor air temperature and humidity, evaporating temperature setting values in the indoor heat exchanger and the ventilator cooler are set to be between the respective maximum evaporating temperature setting values and the respective minimum evaporating temperature setting values, and evaporating temperatures in the indoor heat exchanger and the ventilator cooler are controlled so as to be the respective evaporating temperature setting values.
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