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

Rosahl Quick select


Quickly check if Rosahl membranes are suitable for your application.

How does Rosahl work?

Click to see how Rosahl membrane dehumidifers work

More on selection here

More detailed information on selecting the correct membrane for your application go here

Rosahl quick selection


Many factors influence membrane selection for a particular application, and we recommend you go here for more selection information.  Use this section to quickly check if Rosahl may be suitable for your application.


Key selection factors

  • For best performance, your enclosures need to be sealed against moisture ingress.
  • Membranes have a typical half-life of five years when run 24/7.  Oversize to extend useful installed life
  • Drying times are extended for larger containers, and multiple membranes may be installed

Typical M-Series drying curve for a 50 litre container at 30°C 90% RH

Image of Rosahl drying performance for a 50 litre enclosure

 Rosahl membrane quick selection table

In addition to enclosure size, humidity of the outside air is a factor affecting selection. The table below gives selection information at local ambients of <90% and <70% RH


For <90% RH ambient
Target humidity
30% RH
Target humidity
50% RH
Target humidity
75% RH
For <70% RH ambient
Target humidity
25% RH
Target humidity
40% RH
Target humidity
60% RH
Membrane selection
PD4, PD50.25l0.5l1l
PD2, PD3, RD3, RD4 0.5l1 l2 l
M-2J1R60 l 125 l250l
M-3M1R90 l180 l350 l
M-3J1R & MDL-30.125 m³0.250 m³0.5 m³
M-5J1R & MDL-5 0.25 m³0.5 m³1 m³
M-7J1R & MDL-70.5 m³1 m³2 m³
M-10J1R1 m³2 m³4 m³