Messages

Subject:
dehumidifier will dry lumber, but

Bill Tindall, E.Tn.
The equilibrium moisture content of wood depends on the relative humidity. Lower RH by any means, equilibrate wood to this RH and eventually it will dry. Arizona for example.

There are two problems with the dehumidifier approach. The air coming out of the unit is cold and 100% RH. Unless there is some means of heating this air before it gets to the lumber stack the lumber stack will approach the temperate of the exit air and equilibrate at 100% RH.

And.....the diffusion rate of moisture out of lumber is highly temperature dependent. Without heat, equilibration will take a long time.

Bottom line....as you describe, dehumidification without external heating will not work.

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