The reason this system which is known as the beginning of refrigerator manufacturing in history is preferred by hotels is it operates with precisely no vibration and no noise. Since no mechanical equipment is used, no vibration or noise is created in this method of heating the liquid cooler which contains an ammonia and water mixture with a resistor. Because the cooling gas is required to remain constantly hot, the resistor keeps operating for most of the day. The cooling performance is calculated using the DELTA-T fixed value in this system which can refrigerate between +4 and +14°C degrees at 16-32°C ambient temperature. The cooling performance is determined by subtracting the DELTA-T (20°C) value from the ambient temperature. For this reason, if the minibar is to be used within a minibar cabinet the ventilation of the cabinet needs to be planned extremely well.
