On Monday, 18 March 2019 05:00:53 UTC, FMurtz wrote:
Tim+ wrote:

Can you estimate this with an ordinary multimeter? If so, what sort of
figures would indicate a moisture level below 20%?

I assume meters made for the purpose just measure resistance across a fixed
distance, but I could be wrong.

Tim

Why does it matter? I have a wood heater and it does not matter how wet
the wood is once you have started the fire, It dries out quickly.

It also produces a lot less heat and more air pollution.
(Any water present has to be evaporated off before it can burn.)
Tars up the chimney and increases chance of chimney fire.