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3. Heating
3.1 First heating
Once the sauna heater has been installed, do the rst heat-
ing which must be done with half capacity and thereaf-
ter allow the sauna heater to cool, so that the bricks and
stones settle down. The rst heating also removes any
possible humidity from the bricks, which might increase
the heating time of the sauna heater. If the upper stones do
not become evenly hot, add small stones to the hot spots
to get an even draught in the whole upper surface of the
stone compartment.
3.2 Heating
Open the ash drawer 5-10 cm. See that sufcient volume
of combustion air enters in the sauna either from the valve
or through the door.
To ensure correct travel path of smoke, open the valve in
front of the closing plan, open the closing pan and close
the valve in front of the closing pan as shown on the above
drawing. Check that the ue is open.
The heating time depends signicantly on the wood qual-
ity. The fastest method to heat the sauna heater to the
temperature suitable for steam procedures is to use nely
cut birch wood that is dry. Fill the rebox with wood as
usual and light it from above. During burning the re box
hatch should be kept closed and the ash drawer opened.
When more than half of the wood has been burned, con-
tinue relling the rebox sufciently often. Towards the end
of heating the draught can be reduced with the help of the
ash drawer.
Heating is stopped, when the lower parts of the upmost
stones start glowing red. For the last ll of the rebox we
recommend using small rewood, which burn up quick-
ly and do not leave coal glowing long. To prevent soot
problems, AITO sauna heater should always be heated so
hot that the lower halves of the upper stones glow red.
When there are almost no embers left, push ash on the
grate in the ash drawer. The ash drawer should be emp-
tied. Now close the ash drawer, rebox hatch and the clo-
sing pan and the valve in front of the closing pan. After this
the glowing redness spreads to the upper surfaces of the
stones and the stones become free from soot. Let the sau-
na heater stay like this for a while so that heat will spread
evenly in the area and the sauna heater is ready for the
steam bath (“löyly”).
Before starting enjoying your sauna throw the rst “löyly”,
which removes any ash dust on the stones and the next
“löylys” will already be cleaner. The first “löyly” is thrown
with the closing pan open and the valve in front of the
closing pan closed. In this way any ash on the stones
is directed in the stack via the flue. After this the sauna
is ventilated.
If there is no ventilation valve in the upper part of the sauna,
the sauna can, when necessary, be ventilated by closing
the steam hatch and by opening the valve in front of the
closing pan. In this case the closing pan must be closed
(see the drawing below). This method can also be used for
drying the sauna after the bathing procedure.
Due to the risk of carbon monoxide, it is
strictly forbidden to heat the heat storing
sauna heater additionally during the bathing
procedure.
!
If for some reason the sauna heater requires additional
heating, the bathing procedure should be interrupted and
the sauna heater should be heated once again. The bath-
ing procedure can be continued only when there are no
ames and embers left, the ash drawer has been emptied
and the rst “löyly” has been thrown according to the
instructions.
The sauna heater is ready for the bathing procedure when
the rst “löyly” has been thrown, the opening pan and the
valve in front of the opening pan is closed and the steam
hatch is open (see the above drawing).
To start the bathing procedure open the steam hatch.
Throw “löyly” in small quantities. The mass of the sauna
heater and the amount of stones guarantee long, soft and
oxygen-rich steam for many hours.
Enjoy your sauna!
GB
