How quickly do super dry logs take up moisture?

[gdh]

Everything we dried this summer is back up to 17 now, I think under 25% is fine and under 20% is perfect for burning.

 

We've never had any complaints selling around the 17 mark so everything we sell now I just dry until there's nothing over 17, I don't think it's cost effective /efficient to go much lower.

[SbTVF]

None of our stock ever hangs about long enough to do this test! Will have to hold a few logs of different species back as an experiment.

Just to say when we kiln dry I rarely check moisture. The kiln runs until no more moisture is leaving the logs (confirmed via humidity in the kiln) so our logs are as dry as they can ever be.
When we force dried without any humidity control we couldn’t get the logs fully dry in the centre (case hardening occurred) By holding the logs at high RH for the first few days we ensure the whole log is dry. Neither of my meters give any reading at all the logs are so dry. I assume it’s in the region of 15-18% even for the larger logs.