Aito 16 - Smoke Flue; Ventilation

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6
EN
Protecting a floor made of combustible material
Figure 3. If the sauna heater is installed on a oor 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 ue 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 classied as non-
combustible, it is sufcient to have a 50 mm air gap be-
tween the upright surfaces and the wall.
2.4 Smoke flue
A smoke ue of the sauna heater must meet the require-
ments of class T600 irrelevant of the material of the smoke
ue. The minimum recommended draft of the smoke ue
is 12 Pa.
A modular smoke ue must meet the requirements of class
T600 and provided with CE-marking. When installing a
modular smoke ue safety clearances stipulated in the in-
stallation manual of the smoke ue shall be followed. The
minimum recommended diameter of a modular smoke ue
is 120 mm. The weight of the smoke ue must not cause
load on the sauna heater. The sauna heater should be con-
nected to a separate smoke ue. A smoke ue made of
bricks must be at least the so-called half-brick smoke ue.
2.5 Ventilation
Ventilation of the steam room should be sufciently ef-
cient 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
(sufcient gap).
Extraction fans working in the same room as the rebox
may cause problems. Inlets of incoming air should be lo-
cated so that they do not get blocked (for instance because
of snow). A rebox needs combustion air in a volume of
6–10 m
3
per kilo of red wood. The diameter of the ventila-
tion 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 ventilation 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.