+44 203 286 8189 steve.jones@westside-int.com

How does Rosahl work?

ROSAHL is a unique dehumidifier that works using a solid state polymer electrolyte (SPE) to remove moisture from the air in enclosures by electrolysis when a 3V dc voltage is applied.  It provides clean moisture extraction and low cost, maintenance free performance.

Sometime called an ionic membrane dehumidifier, Rosahl works by electrolysis.The SPE consists of a proton-conductive solid polymer electrolyte and porous electrodes with a catalytic layer composed of noble metal particles.When a 3 Volt D.C. voltage is applied to the porous electrode attached to the SPE the moisture on the anode (dehumidifying) side dissociates into hydrogen ions (H+) and oxygen: the hydrogen ions migrate through the membrane to be discharged on the cathode (moisture discharging) side where they react with oxygen in the air, resulting in water vapour being discharged.  Similarly, if the membrane is reversed a humidifying effect is achieved.

Rosahl has no moving parts, making it economical to run, silent, and vibration free.  As no liquid water is involved in the process, it is maintenance-free making it suitable for use in remote locations or where servicing is expensive or otherwise difficult. The membrane has a long operating life and has been tested to work from -10 to +50C

How does an ionic membrane dehumidifier work?