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AIR SUPPLY / VENTILATION / CHIMNEY DRAW
Your stove will require a constant air supply and should not be used at the same time and in the same room/space as extractor fans or
any device which may draw air supply away from the stove, unless the fire is connected to its direct air feed socket. Normally for most
houses in the UK built before 2008 no extra ventilation is required when installing a stove rated at 5kW or less. Note: The requirements
regarding ventilation have been updated in the most recent version of the Building Regulations and are now based on the air
permeability of the house. Any stove being installed in a home that has permeability ratings of 5 m3/hm2 or less will require ventilation
irrespective of the KW output.
The whole Signature range has 100mm direct air feed inlets that can be connected to bring fresh air from the outside, directly into the
fire. If the stove is drawing in air directly from the room, ensure the direct air spigot at the rear has at least 50mm gap from the back
wall to ensure oxygen can freely flow into the fire. If you find the stove draws well with the door ajar but often dies when the door is
closed, it could be caused by a lack of oxygen able to flow through that spigot, or a lack of free oxygen in the room in general.
The testing for this model has been carried out on a chimney with a rating of 12 Pascals and this is industry standard. Anything less
than this approved rating could cause smoke to spill from the stove into the room. The chimney is often overlooked by the end user but
has a huge bearing on how the fire will perform. The chimney creates suction that pulls the smoke up the chimney and out, opposed to
forcing it out of the fire and into the room. The most common cause for a chimney not performing well is the fact it is cold. Cold air
sinks the smoke down, whereas a warmer chimney draws the smoke up and out. This issue is most common on twin-walled chimney
systems and exposed brick chimneys on the gable end of a house. Getting heat up the chimney as quickly as possible will help to ensure
this negative pressure is reversed as quickly as possible. The minimum chimney height required for this unit is 4.5 meters. The
complete system must have fewer than 4 bends and each bend should be 45 degrees or under. You can exit from the rear of the fire and
attach our custom rear flue box or a 90-degree T piece. Ensure single skin flue pipe is kept away from combustible materials as this will
get very hot.
If you are installing into a brick chimney, we would suggest lining the chimney with an approved flexible liner. (316 or 904 grade) Doing
so will increase the stove efficiency. Do not connect or share the flue or chimney.
CHIMNEY LINING
When purchasing flexible flue liner, or twin walled flue, 6” diameter is required if th
e Defra stop is not fitted. If the Defra stop is in place
a 5” liner or twin
-
walled flue can be installed. It is against the law to install a 5” liner on a woodburning stove unless it has the required
Defra fitting in place. The flue pipe must be fitted INSIDE the flue spigot and sealed with a generous amount of Fire Cement. Access
should be provided for cleaning the flue to ensure that the passageways for exhaust gases remain free from obstruction. This stove
cannot be installed into a shared flue.
