These are water condensing type, based on “Refrigeration Cycle” to avoid use of expensive chemicals required for desiccant type models. The unit is self standing & mounted on sturdy iron frame, fitted with castor wheels. It removes excess moisture from the atmosphere & is fitted with hermetically sealed compressor. Heat exchanger and water condensing coils are made of copper. Water tank is provided below the unit to collect condensate water. Humidity is controlled with Humidity Controller incorporated in the unit, up to 30% +_3% Rh, depending upon ambient conditions. To achieve very low humidity, the room should have a independent window type AC to much with the dehumidifier heat load in the room. Suitable to work on 220 V AC.