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Ask your installer for advice regarding the flue. Refer
to the European norm EN13384 for a correct calcu-
lation for the flue.
The flue must satisfy the following requirements:
The flue or chimney must be made of fire-resistant
material, preferably ceramics or stainless steel.
The flue or chimney must be airtight and well
cleaned and guarantee sufficient draught.
A draught/vacuum of 15 - 20 Pa during normal
operation is ideal.
Starting from the flue spigot, the flue must run as
vertically as possible. Changes in direction and
horizontal pieces disrupt the outward flow of
combustion gases and may cause soot deposits.
To prevent combustion gases from cooling down
too much, which reduces the draught, ensure that
the interior diameter is not too big.
The flue or chimney should ideally have the same
diameter as the connection collar.
For nominal diameter: see 'Technical data'
appendix. If the smoke channel is well
insulated, the diameter may be slightly bigger
(up to 2x the section of the connection collar).
The section (area) of the smoke channel must be
constant. Wider segments and (in particular)
narrower segments disrupt the outward flow of
combustion gases.
In fitting a cover plate/exhaust cap to the flue:
make sure that the cover does not restrict the flue
outlet and that the cap does not impede the
outward flow of combustion gases.
The flue must end in a zone that is not affected by
surrounding buildings, trees or other obstacles.
The flue outside the house must be insulated.
The flue should be at least 4 metres high.
As a rule of thumb: 60 cm above the ridge of the
roof.
If the ridge of the roof is more than 3 metres from
the flue: use the measurements given in the
following figure. A = the highest point of the roof
within a distance of 3 metres.
Subject to change because of technical improvements
Room ventilation
For good combustion, the appliance needs air
(oxygen). This air is supplied via adjustable air inlets
from the area in which the appliance is installed.
If ventilation is insufficient, combustion will be
incomplete, which may lead toxic gases to
spread through the room.
As a rule of thumb, the air supply should be
5.5 cm²/kW. Extra ventilation is needed when:
The appliance is in a well-insulated area.
There is mechanical ventilation, for example a
central extraction system or an extraction hood in
an open kitchen.
You can provide extra ventilation by having a ventil-
ation louvre fitted on the outside wall.
Make sure that other air consuming appliances (such
as tumble-driers, other heating appliances or a
bathroom fan) have their own supply of outside air, or
are switched off when you use the appliance.
Floor and walls
The floor on which the appliance is placed must have
sufficient bearing capacity. The weight of the
appliance is given in the appendix "Technical Data
appendix".
Protect flammable flooring from heat radiation
by means of a fireproof protective plate. See
the appendix "Distance from combustible
material".
Remove combustible material such as
linoleum, carpets/rugs and similar materials
below the fireproof protective plate.
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