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The timber should be stacked such that the drying unit
is able to blow the circulating air under the timber stack.
Place the timber on the bed using spacers between each
layer. The spacers should be at least 15 mm thick and
placed above each other between the timber layers.
STACKING THE TIMBER
Place the drying chamber on a stable and flat surface that can hold the weight when the drying chamber is fully loaded
with wood. The foundation can be built of wood, preferably with a layer of insulation boards, e.g. styrofoam, to make
it more energy efficient.
In a part of the drying process condensation will occur and you will get water in the bottom of the drying chamber.
To save energy och shorten the drying process the foundation underneath the drying chamber can be adjusted so it
is leaning about 2 degrees near the corner that is furthest from the drying unit. Make a 5 mm drainage hole in that
corner and make room underneath the drying chamber so the water can infiltrate into the ground.
The drying chamber should be placed outside and at a safety distance from other buildings. The WDU drying unit
should be protected from water and other precipitation. This is best achieved with the Logosol drying chamber that has
an outer cover which protects it. Be aware that wood with a high moisture level that is heated can often have a strong
smell and that large amount of steam is ventilated out from the drying chamber.
At increased temperatures slight colour changes in the wood occurs. Timber with a large amount of sapwood and
timber with a lot of knots (especially dry knots) darkens more easily. But there are also benefits with high temperatures,
especially when it comes to furniture timber. High temperatures force out resin from the wood, which reduces the risk
of later resin bleeding. The colour changes that occur in a Sauno wood drying kiln are usually minor. If you are unsure
of what colour changes there will be, it can be a good idea that you first dry a smaller amount of wood as a test. For
hardwood, colour changes that come when using a wood drying kiln are usually desirable. Today, most of the modern
drying plants use tempreatures between 70° and 110°C. The Sauno kiln uses a maximum temperature of 75°C.
SITING
COLOUR CHANGES
