Desiccant systems are a variation in gas cooling. They remove unwanted moisture and allow for precise control of humidity levels.
They supply “pure dehumidification” and are generally used in buildings that are otherwise conventionally cooled. Desiccants have particular advantages for any application that can gain from enhanced dehumidification over and above that normally done by conventional cooling systems.
Desiccant dehumidification technology has a successful track record over more than 70 years for industrial applications such as product drying and corrosion prevention.
In commercial buildings, the most common application for a desiccant system is to remove humidity from outdoor ventilation air. In humid climates, a large flow of ventilation will often build up indoor humidity to a level that cannot be adequately controlled by conventional air conditioning systems. By using a desiccant system to produce dry outdoor ventilation air, the cooling load is reduced and the tendency to build up humidity is eliminated.
It has been used for many years in sanitised rooms, hospitals, museums, and other special cases requiring highly controlled humidity levels. There also exist portable systems that allow for on-demand use.
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