What are ROSAHL products?

ROSAHL a new technology that answers all the problems associated with traditional dehumidification solutions

Traditional dehumidifying solutions are beset with inherent problems, such as size, weight, constant emptying of collection tanks, noise, high power consumption and also a limited life expectancy as they use moving parts or need gel replacement.

With ROSAHL dehumidification products these problems are removed as ROSAHL products are extremely compact and light, do not require any emptying, are completely silent, use very little power and have no moving parts or gel to wear or be replaced.

This unique product literally removes moisture out of the air from an enclosed area (such as a switch cabinet), absorbs it through the unique membrane, and then discharges it as air on the other side.

How do ROSAHL dehumidifiers work?

The principle of how the ROSAHL products work is incredibly simple. The core component is a solid electrolyte polymer membrane. This special membrane has a very porous inner side which attracts moisture (water droplets) that is in the air. This moisture is then absorbed into the membrane.

When the water is in the membrane DC current (electricity) is used to decompose and breakdown the chemical elements of water (H 2 0) into Hydrogen and Oxygen ions. These ions are then passed through to the other side of the membrane and then discharged into the air as gas molecules.

In fact if the electrical poles on the membrane are reversed it actually reverses the process and creates moisture on the porous side, but this does have an effect on the life expectancy of the membrane so we recommend only using it to extract moisture for applications.

What type of applications are ROSAHL products suited for?

ROSAHL products are extremely flexible can be used in a wide variety of dehumidification applications, ranging from sterile rooms through to challenging external environments such as externally housed   traffic control cabinets.

The moisture extraction rate of ROSAHL products is relatively low compared to larger and noisier conventional desiccant (absorption) and refrigerant (condensing) dehumidifiers, and they are best used in enclosed areas of up to 8 metres cubed (8m³). For suitable capacity per product please see the specification charts.

Since ROSAHL products use very little energy compared to other types of humidification, they can be left to run 24hours a day, 365 days a week continuously extracting moisture from an enclosed area without incurring major energy costs. In fact since they need no emptying they can be left just to get on with the job for years without any worries.

Why dehumidify?

Having high relative humidity can affect many things such as electronic products, whose working characteristics can change dramatically with humidity. Corrosion of metals can occur mainly when humidity is over 50%. Reduce humidity to less than 50% and corrosion of metals is drastically reduced. Iron and steel do not rust if the air over the surface has a relative humidity below 50%.

Bacteria (which causes smells and can damage goods) needs humidity over 50% to survive and multiply. Mould and funguses need a relative high humidity of over 70% to flourish; keep the relative humidity less than 50% for more than 95% of the time will help prevent any organic growth.

Please remember that a surface will not have condensation (water) forming on it if the air in contact with it has a dewpoint (The temperature where water condensates) lower than the surface temperature. This still means even though you see no water in an enclosed space it may still have water vapour in the air which can cause problems to items stored within.

Typical examples of suitable applications are:

  • Traffic control and display cabinets
  • Outdoor multimedia screens and displays
  • Telecommunications such as mobile phone outstations
  • Precision equipment storage cabinets
  • Museum displays and exhibition cabinets
  • Reduction of mould in closed rooms
  • Odour reduction
  • Storage of hydroscopic materials
  • Semiconductor manufacturing