The Idea
A membrane plate uses a selective membrane instead of bare metal foil, letting water vapour pass while keeping air streams separate. You get humidity recovery with no moving parts.
Comparison
| Fixed Plate (sensible) | Membrane Plate | |
|---|---|---|
| Moisture recovery | No | Yes |
| Moving parts | None | None |
| Cost | Lowest | Higher |
When to Choose Membrane
Pick it when you need humidity control but cannot accept a rotary wheel's moving parts or slight stream carryover - hospitals, labs, and sensitive spaces.