3
The chimney connection
The chimney opening must follow national
and local regulations. However, the area of
the opening should never be less than 175
cm
2
, which corresponds to a diameter of 150
mm. If a damper is fitted in the flue gas pipe,
there must always be at least 20 cm
2
of free
passage, even when the damper is in its
“closed” position. If local regulations permit,
two contained fireplaces can be connected to
the same chimney. However, you must abide
by local regulations regarding the distance
between the two connections.
Wood-burning stoves must never be con-
nected to chimneys that are also linked to a
gasfired heater. An efficient stove makes high
demand on chimney properties – so always
have your local chimney sweep evaluate your
chimney.
Connection to a brick chimney
Brick a thimble into the chimney and seat the
flue gas pipe in this. The thimble and flue gas
pipe must not penetrate the chimney opening
itself, but must be flush with the inside of
the chimney duct. Joins between brickwork,
the thimble and flue gas pipe must be sealed
with fireproof material and/or beading.
Connection to a steel chimney
When fitting a connection from a top-output
stove directly to a steel chimney, we recom-
mend fitting the chimney tube inside the flue
gas spigot so that any soot and condensation
drops into the stove itself rather than collec-
ting on the exterior surface of the stove.
Changing smoke outlet from top-mounted to
rear-mounted (see fig. 5-12 on page 7). For
connections to chimneys that are run through
ceilings, all national and local regulations re-
garding distance to flammable material must
be followed. It is important that the chimney
is fitted with roof support so that the top
panel of the stove is not required to bear
the entire weight of the chimney (excessive
weight may damage the stove).
Draft conditions
Poor draft may result in smoke being emitted
from the stove when the door is opened. The
minimum chimney draft to ensure satisfactory
combustion in stoves of this kind is 11 PA.
However, there will still be a risk of smoke emis-
sion if the firing door is opened during power-
ful firing. The flue gas temperature at nominal
output is 257°C when expelled to an exterior
temperature of 20°C. The flue gas mass flow is
5,4 g/sec. The chimney draft is generated by the
difference between the high temperature of
the chimney and the low temperature of the
fresh air. The length and insulation of the chim-
ney, wind and weather conditions also have an
effect on the ability of the chimney to gene-
rate appropriate under-pressure. If the stove
has not been used in a while, check that the
chimney and stove are not blocked with soot,
bird nests, etc., before using it.
Reduced draft can occur when:
- The difference in temperature is too small – due
to insufficient chimney insulation, for example.
- The outdoor temperature is too high – in
summer, for example.
- No wind is blowing.
- The chimney is too low and sheltered.
- The chimney contains false air.
- The chimney and flue gas pipe are blocked.
- The house is too airtight (i.e. when there is
an insufficient supply of fresh air).
- Poor smoke extraction (poor draft
conditions) due to a cold chimney or bad
weather conditions can be compensated for
by increasing the airflow into the stove.
Good draft occurs when:
- The difference in temperature between
the chimney and outdoor air is high.
- The weather is fine.
- The wind is blowing strongly.
- The chimney is of the correct height: at
least 4.00 m above the stove and free of
the roof ridge.
INSTRUCTIONS fOR USE
first firing
The stove has been treated with a heat-resi-
stant coating which hardens at a temperature
of approximately 250 ºC.
This hardening process causes the production
of smoke and malodorous fumes, so the room
must be very well ventilated. During the first
firing, which should be carried out using ap-
proximatly 1,5 kg. of wood, the stoking door
must be left slightly open and must not be
