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20
FI
Protecting a floor made of combustible material
Figure 3.
If the sauna heater is installed on a floor made of
combustible materials, an installation base must be used.
A piece of sheet metal must be installed in front of the in-
stallation base, which extends at least 100 mm over the
sides of the heater door and at least 400 mm in front of
the sauna heater. The sheet metal edges facing the sauna
heater must be turned up, so that coal cannot get under
the installation base.
Please observe that the safety clearance of an uninsu-
lated smoke flue from structures made of combustible
materials is 1000 mm or any other distance stipulated in
the manufacturer’s instructions.
2.3.2 Non-combustible structure
If the wall is masonry or other structure classified as non-
combustible, it is sufficient to have a 50 mm air gap be-
tween the upright surfaces and the wall.
2.4 Smoke flue
A smoke flue of the sauna heater must meet the require-
ments of class T600 irrelevant of the material of the smoke
flue. The minimum recommended draft of the smoke flue is
12 Pa. Stove door closed.
A modular smoke flue must meet the requirements of class
T600 and provided with CE-marking. When installing a
modular smoke flue safety clearances stipulated in the in-
stallation manual of the smoke flue shall be followed. The
minimum recommended diameter of a modular smoke flue
is 120 mm. The weight of the smoke flue must not cause
load on the sauna heater. The sauna heater should be con-
nected to a separate smoke flue. A smoke flue made of
bricks must be at least the so-called half-brick smoke flue.
2.5 Ventilation
Ventilation of the steam room should be sufficiently ef-
ficient and should function so, that fresh incoming air
is routed as close to the sauna heater as possible. Also
proper air circulation has to be provided in the steam room
during using the sauna so that air can exit from under the
sauna bench or from under the door of the washing room
(sufficient gap).
Other possible fireplaces that are used simultaneously
must be considered, and make sure there is enough re-
placement air. Extraction fans working in the same room
as the firebox may cause problems. Inlets of incoming air
should be located so that they do not get blocked (for in-
stance because of snow). A firebox needs combustion air
in a volume of 6–10 m
3
per kilo of fired wood. The diam-
eter of the ventilation opening must be at least 100 mm.
Forced air system should be built according to the design
prepared by the designer of the heating, water and ventila-
tion systems.
There shall be a possibility to ventilate sauna rooms after
using the sauna and to dry the rooms so that air will exit via
the upper part of the steam room.
Figure 3.
EN
