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Thermal protection of the floor in front of the sauna woodburning stove:
A floor consisting of combustible material must be protected with a metal sheet
extending 100 mm to each side of the woodburning stove fire door and 400 mm to the
front.
INITIAL HEATING
Before use and installation of stones, the sauna woodburning stove must be pre-
heated to remove any protective agents. 1-2 firebox loads of wood is sufficient for
initial heating. Ensure that the sauna room has sufficient ventilation during initial
heating to aid removal of combustion gases generated by the burning off of protective
agents. Initial heating can also be performed outdoors.
SAUNA WOODBURNING STOVE STONES
We recommend use of NARVI olivine diabase stones. Stack the stones in the stone
compartment so that the biggest stones are at the bottom. In order to ensure good
air circulation between the stones, do not stack the stones too tightly. NARVI sauna
woodburning stove stones come ready washed and can be loaded directly into the
sauna stove. We do not recommend use of light stone types. Sauna water used on
the stove should always be clean. Use of seawater will reduce the service life of your
sauna stove considerably.
FIREWOOD
Both hardwood and softwood species will provide ideal fuel for your Narvi sauna
woodburning stove. Trees for firewood should be felled and cross-cut outside of their
growing season. Firewood should be dried outdoors during summer months and
transferred to dry storage before damp autumn/winter weather sets in. The amount of
firewood stored should ideally cover one to two years worth of consumption, during
which time the moisture content of the wood will reach < 20 %.
HEATING
Always clean and empty the fire grate and ashpan first before lighting your sauna
woodburning stove or stove. Begin lighting the woodburning stove using a small
quantity of kindling. Once the wood is burning well, add more wood until the firebox
is stacked about 2/3 full. To aid combustion, additional air intake can be regulated by
adjusting the ashpan. Avoid overheating the sauna woodburning stove to the extent
that the channels within the stone compartment remain red-hot for long periods, as
this overloads the firebox and shortens the service life of the woodburning stove. At
the end of your sauna bath, a low fire can be left burning in the woodburning stove to
help dry out the sauna.
SAUNA WOODBURNING STOVE MAINTENANCE
The sauna woodburning stove should be swept via the chimney sweeping hatches
once a year to maintain the best possible flue draw. It is also recommended to check
the condition of sauna woodburning stove stones on an annual basis and replace any
that may have deteriorated in service.
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