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can be used. These chimneys must be fitted in accordance with
the manufacturers instructions and in compliance with Building
Regulations.
This product must not be installed on a shared flue.
Flue Deposits
If the chimney was previously used as an open fire, it is possible
that the higher flue gas temperatures generated by the stove
may loosen deposits that were previously adhered to the inner
surface of the flue pipe which could cause blockage of the flue
pipe. We recommend that in this situation a second sweeping of
the chimney should be carried out within one month of initial stove
use after installation.
Room Ventilation
For safe operation this stove must be provided with combustion
air supply in addition to normal room ventilation, in accordance
with Building Regulations. Minimum ventilation requirements vary
depending on whether the dwelling is considered to be of standard
construction or of airtight construction, or if a flue draught stabiliser
has been fitted. The required open air vent sizes are as follows:
Table 4
Standard build dwellings {air permeability >5.0m³ /(h.m²)}
No Flue Stabiliser
With Flue Stabiliser
Airtight build dwellings {air permeability ≤5.0m³ /(h.m²)}
No Flue Stabiliser
With Flue Stabiliser
Flue Draught
The chimney should be checked before the stove is installed to
ensure that there is adequate flue pull. The draught can be checked
initially by using a smoke match close to the flue opening. If the
chimney doesn't pull the smoke it may suggest that the chimney
needs further attention. Any remedial work to the chimney flue
should be carried out by a suitably Qualified Engineer.
A flue draught of minimum 12 Pascal to maximum 25 Pascal is
required for satisfactory appliance performance. The flue draught
should be checked under fire at high output and if it exceeds the
recommended maximum a flue draught stabiliser (or flue damper
as it is also known) must be fitted so the rate of burning can be
controlled and prevent overfiring.
An extractor fan must not be used in the same room as this
appliance.
Floor Protection & Installation Clearances
In all instances the stove should be positioned on a non-
combustible hearth. The construction of the hearth must conform
to Building Regulations, must be firm, non-combustible and capable
of supporting the stove. Care should be taken to ensure the stove
is level and the hearth is secure. The hearth itself should not be
less than 125mm thick, including the thickness of the floor and
any decorative top surface (e.g. tiling). Allow an apron of at least
300mm at the front of the stove in case of spills when de-ashing.
(Fig 4) shows the minimum distances required from the hearth
edge to the sides of the stove.
The stove can also be recessed in a suitable sized fireplace. We
recommend a permanent free air gap of at least 100mm should be
left around the sides and rear where possible and 300mm around
No additional vent required
15 cm²
27 cm²
42 cm²
- 2 -
the top to obtain maximum heat output and for access to the rear
of the stove for maintenance and cleaning.
Place the product in the desired location on fireproof hearth taking
note of installation clearances from adjacent walls (Fig 5). Adjust
the screws on the bottom of the feet to ensure the stove is level
and steady (see 'A' Fig 2). The stove can be screw fixed to the
floor when placed in the desired position, using the holes provided
in the feet.
The minimum safe distances to combustable materials that
must be observed are 450mm (sides) and 400mm (rear).
Any surrounding combustible material should not exceed 80°C.
Furniture and general soft furnishings should be kept at a safe
distance of 900mm from the stove and flue pipe.
Flue Pipes
The flue pipe used to connect to the stove should be made of cast
iron, 316 grade stainless steel or vitreous enamelled steel, nominal
thickness 1.2mm. The diameter of the flue pipe should be 125mm
(5") for the Westcott 5 clean burn model.
Connect the flue pipe to the stove making sure that it fits snugly
into the base of the flue collar (Fig 3). Seal the collar and flue
connection with fire cement or with other suitable high temperature
sealant. Add flue sections as required; note that all flue sockets
must face upwards. Ensure that the flue pipe end is no closer
than 76mm to the side or rear of the chimney walls. It is essential
that all connections between the stove and the chimney flue are
sealed and made airtight.
Avoid using bends greater than 45° to the vertical (Fig 6). All flue
pipes should be as close to vertical where possible. Both chimney
and flue pipe must be accessible for cleaning and if ALL parts
of the chimney cannot be reached, a soot door must be fitted to
enable this to be done.
Typical installation for Inglenook Fireplaces
Inglenook fireplaces can have very large bore chimneys (Fig 7).
Check with your installer – you may need a stainless steel flexible
flue liner for solid fuel fitting.
Flue Damper (Not Supplied)
When burning wood, a flue damper may be fitted to reduce the
draught through the stove if the draught is too high. When the
damper is set in the open position the chimney draws at full
draught, increasing the volume of air flow through the stove and
flue. Shutting the damper restricts the flow, slowing the rate of
burning.
The damper should be fitted to the stove flue and should be the
same size as the flue pipe. As a rule it should be fitted no closer
than 700mm from the flue outlet of the appliance.
A flue damper should not be fitted when burning solid fuels
other than wood.
Commissioning
Upon completion of installation, the stove and flue system should
be tested by a suitably qualified person to make sure it is safe for
normal use. A smoke draw test should be completed to check for
soundness of joints and seals and also that all smoke and fumes
are taken from the appliance up the chimney and emitted safely.
First warm the flue with a blowlamp or similar for about 10 minutes.
Place a lit smoke pellet on the centre of the grate with the air
controls open. Close the door – the smoke should be drawn up the
flue and be seen to exit from the flue terminal. Complete the test
with all windows and doors shut in the room where the appliance
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