Rosahl is a unique electric micro-dehumidifier for very small spaces and enclosure where maintenance-free drying is an important factor. It uses a solid polymer membrane (SPE) installed in a flat panel, making it suitable for use in a wide range of enclosures from under two litres up to 4m³ (280 cu ft) in volume.
The name Rosahl comes from a Japanese phrase meaning “removing dew”, and it was developed by Mitsubishi Electric Corporation member company Ryosai Technica
in Japan in response to a demand for compact maintenance free,
air drying solutions to protect sensitive equipment from moisture damage. It has since found its way into uses for protecting museum display cabinets, telecommunications equipment, manufacturing processes and electrical cabinets.
Rosahl dehumidifiers work using electrolysis
when connected to a 3V DC low power source. As the membrane has no moving parts, it is silent, vibration free, and has a very low average energy footprint. The process does not produce liquid water, making it maintenance free and giving the membrane a long operating life.