Direct dry-expansion evaporation takes place in the cooling and freezing appliances and condensation takes place in air-cooled condensers mounted on the roof of the building. ISO-4 has a heat exchanger between the cooling and freezing circuits, but it was used during the period of measurement.

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direct dry-expansion evaporation takes place in the cooling and freezing appliances and condensation takes place in air-cooled condensers mounted on the roof of the building. iso-4 has a heat exchanger between the cooling and freezing circuits, but it was used during the period of measurement.