faster drying. The above discussion
refers to our standard hot-air kilns.
QI have read that you sug- gest a target MC for oak and other hardwoods for
cabinets and furniture of
Can you explain why please? Can we
get every piece between these two
values? Presently our kiln operator
shoots for 5 percent MC.
AAppreciate that the range of 6. 8 percent to 7.0 per- cent MC is a target to aim for. We might miss once in
a while by a fraction of a percent. Second, this is the average MC of a load
or batch of lumber. We do expect, in a
good kiln drying operation, that about
two-thirds of the MC values will be
within +0.3 to -0.3 percent MC around
So, if the average of a load is 6. 9
percent MC, then two-thirds of the
pieces will likely be between 6. 6 percent to 7. 2 percent MC. Further, 99
percent of the pieces will be between
5. 9 percent MC to 7. 8 percent MC.
Technically speaking, this is a standard
deviation of MC of 0.3, which good
kiln operations can achieve and which
mean that you will likely not experience MC problems.
Why do we choose this target? Most
homes and offices in North American
range between 30 percent RH and
50 percent RH weekly average. This
is equivalent to 6.0 percent to 9.0
percent MC in the wood, although any
moisture changes in a finished product
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