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The draw created by your chimney should be sufficient but not excessive. A chimney that is too
large in crossection, can create problems as the internal volume is large and is difficult to heat. To
avoid this one may have to line the chimney along its full length with tubing of the correct diameter.
A crossection that is too small, on the other hand, will also reduce the draw.
The chimney must be made of inflammable material and be appropriately insulated. The same
chimney or tubing cannot be used for more than one installation (multiple fireplaces).
Always respect the regulations applicable to the country of installation.
Establish that the flue and chimney is of a high quality
– it is the most important component
of the installation.
The flue/chimney ensures correct burning of primary air and the extraction of the
combustion gases.
Inferior performance of the stove is, in most cases, as a result of a problem with the
flue/chimney.
A good chimney should be made of material that does that not conduct too much heat nor
cool down easily.
The minimum diameter of the chimney may be 150mm. Where possible, it is recommended
to increase the flue size to 180mm.
There must be no reduction in the crossectional area. Any reduction in crossection will
cause turbulence and possible backdraft into the room as soon as the door of the stove is
opened.
The chimney must originate in the same room where the stove is installed.
Dampers should not be used.
The flue/chimney must be homogenous.
The flue/chimney/tubing must be able to resist to chimney fires. The flue used should be
rated to withstand temperatures 50
°
C higher than the declared temperature for the stove,
whatever the installation method.
The chimney height must not be less than 4m and should end in “free air” at least 40cm
above the roof pitch or 40cm higher than any obstacle that is within an 8m radius of the
chimney.
A cowl should be installed.
The draw should be between 10
– 15 pascals in normal operation and reduce to 5 pascals
on a slow setting. The draw should not reduce below 10 pascals when the stove is being
used normally as the performance will be negatively affected.
If the draw is far too high, a damper may be considered.
Any tubing used must be of high quality and conform to accepted norms.
It is recommended that a cleaning trap is placed 50cm below the base of the
flue/chimney.
Before connecting the stove, the integrity of the flue/chimney must be confirmed. If
necessary the flue must be cleaned.
The unit should be installed by a recommended professional with all national and local
regulations adhered to.
If there is an extractor in the same space as the stove, it may affect the performance of
the stove.
Other stoves/heaters working in the same space may also cause interference with the
draw.
Never block off existing ventilation points in the room. The unit uses the air coming into
the room for its performance and there should be sufficient renewal of this air in the
room.
These units are not designed to be connected to multiple chimneys.