The VNX module was developed to reduce the cost of building high flow rate CEDI systems and to make it easy to choose a clean, environmentally compatible technology over chemically regenerated mixed bed ion exchange systems.  Higher flowrate CEDI modules result in easier piping and system assembly by reducing the number of modules required. 

In both the LX and VNX, the spacers are stacked up in a conventional plate-and-frame arrangement, with alternating product and reject compartments.  This configuration gives much more even distribution of both fluid flow and current flow than some other configurations, such as spiral wound.  This is very important for both performance and module longevity.