Hidros dehumidifiers are used in a wide range of industrial applications: the plastics industry, paper, wood, packaging, the glass industry, marble industry. In all these areas, the common denominator is that the humidity must be maintained within certain levels so that the industrial process can be carried out successfully. The operating temperatures can be the most diverse and range from a few degrees above zero until reaching 50-60 °C. The values of relative humidity may vary from 15-20% up to 50-60%. Due to this wide range of operating range used, they do not always have the same configuration, but have specific design depending on the concerned application. The sizing is therefore carried out according to the specific needs required by the application in question, that generally is a function of the value of temperature and humidity to ensure, the correct amount of water to be removed, the air flow rate and to ensure the duration of the production cycle .