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A rotary dehumidifier uses a rotating desiccant wheel — active silica gel with a honeycomb structure that provides a large adsorption surface area, high moisture absorption capacity and long service life — that continuously dries the process airstream and is regenerated by a heated airstream. Because there is no refrigeration circuit, there is no practical 0°C dew point floor, and the treated air can reach a dew point of −70°C.
See also: Low-Dew-Point Wheel Desiccant Dehumidifier · Industrial Rotary Dehumidifier Guide · Wheel Desiccant Dehumidifier Unit