2.1.1.
Blackening of the sauna walls
Wooden material in a sauna, such as panels, blackens with age. The blackening process is
sped up by sunlight and the heat from the stove. If the wall surfaces have been processed
with protective panel agents, the blackening of the surface of the wall above the stove can
be seen quite quickly depending on the protective agent used. The blackening is due to the
fact that the protective agents have less resistance to heat than unprocessed wood do. This
has been proven in practical tests. The micronic mineral aggregate that crumbles from the
stones on the stove may blacken the wall surface near the stove.
When following the manufacturer’s approved guidelines in the installation of the
sauna heater, the heater will not heat up enough to endanger the flammable material
in the sauna room.
The maximum temperature allowed in the wall and ceiling surfaces
of the sauna room is 140ºC (284ºF).
Sauna heaters equipped with proper approval marks meet applicable regulations for sauna
installations. Third Party authorities monitor that the regulations are being followed.
Combi Heater Output
When the walls and ceiling are covered with panels, and the insulation behind the panels is
sufficient to prevent thermal flow into the wall materials, the combi heater output is defined
according to the cubic volume of the sauna.
If the sauna has visible uninsulated wall surfaces, such as walls covered with brick, glass block,
concrete or tile, each square metre of said wall surface causes the cubic volume of the sauna to
increase by 1.2 m³. The combi heater output is then selected according to the values given in the
table.
Because log walls are heated slowly, the volume of a log sauna should be multiplied by 1.5,
and the combi heater output should then be selected on the basis of this information.
2.3.
Sauna Room Floor
Due to a large variation in temperature, the sauna stones disintegrate in use. Small pieces of stone
are washed down on the sauna room floor along with the water thrown on the stones. Hot pieces of
stone may damage plastic floor coverings installed underneath and near the heater.
A light-coloured joint grout, used for a tiled floor, may absorb impurities from the stones and water
(e.g iron content).
To prevent aesthetic damage (due to the reasons presented above) only dark joint grouts and floor
coverings made of rock materials should be used underneath and near the combi heater. Make sure
that the water dripping onto the sauna floor enters the floor drain
2.2.
7
10
Fig. 6
20
20
Min 20
Fig. 5
Electrical connections
Temperature Regulator Switch
Temperature Limiter Switch
Wm
U1
V
H
2
H
1
H
3
H
4
400V 3N~
