Drying And Storage - RAIS TOPAS User Manual

ENGLISH
The following table shows the calorific value of different types of wood, which have been
stored for 2 years, and which have a residual moisture of 15-17%.
Wood
Hornbeam
Beech and oak
Ash
Maple
Birch
Mountain pine
Fir
Poplar
1 kg of wood yields the same heat energy irrespective of wood type. 1 kg beech merely
takes up less space than 1 kg of fir.

Drying and storage

Drying wood takes time: proper air drying takes approx. 2 years.
Here are some tips:
Store the wood sawn, split and stacked in an airy, sunny place, which is protected against
rain (the south side of the house is particularly suitable).
Store the firewood stacks at a hand's breadth apart, as this ensures that the air flowing
through takes the moisture with it. Avoid covering the firewood stacks with plastic, as
this prevents the moisture from escaping. It is a good idea to bring the firewood into the
house 2-3 days before you need it.
RAIS - Manual for Rais Topas & Opus
Kg dry wood pr. m
640
580
570
540
510
480
390
380
3
compared to beech/oak
110%
100%
98%
93%
88%
83%
67%
65%
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