Humidification Using Nafion Membranes

Perma Pure humidifiers operate as either water-to-gas or gas-to-gas moisture exchangers. The water-to-gas humidifiers have water on one side of the tube wall and the gas to be humidified on the other. This arrangement offers the greatest amount of humidification, as all sites on the water side of the Nafion tubing are continuously saturated. In this method of humidification, hot, circulated de-ionized water should be used to optimize performance.

Gas-to-gas humidifiers use counter-flowing wet and dry gas streams to move heat and water from one stream to the other. These units are energy efficient, as they do not require any additional power or heat. When gas passes through Nafion tubing, water is absorbed by and moves through the walls of the tubing. The movement of water is driven by the humidity gradient between the inside and the outside of the tubing. A gas stream needs to reside in the device for less than one second in order to reach the proper humidity.

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