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

Membrane dehumidifiers

For both display and museum storage cabinets, Rosahl membrane dehumidifiers offer several benefits over conventional alternatives.

Rosahl is a family of compact, low power, long life devices that use electrolysis to remove excess humidity from within enclosures up to 8m³ (280 cu ft). The process does not involve liquid water making it maintenance and drain free. They are low power devices with a long service life and suitable for 24/7 operation where required. Low power makes them inexpensive to operate and they generate very little heat.

For example, removing up to 8g of water/day can from a 1m³ cabinet using less than 4 Watts of power at 220/240V. For cabinets requiring precise humidity control, fitting a humidistat also reduces energy consumption.  In some installations, ROSAHL is also suitable for humidifying by reversing the installation.

Rosahl’s ionic membrane dehumidifier works by breaking down the water by electrolysis using a 3V DC supply.  It is a noiseless process in which the hydrogen ions migrate through the membrane and recombine with the air outside the case.  Being maintenance free it is suitable for use in remote and difficult to access museum locations. It also reduces operating costs.

Ask your equipment supplier about a ROSAHL controlled cabinet, or contact us for more information.