Page 8 of 20
Chimneys, Flues, Hearths and Surrounds
Chimneys
The
9103 and 9104
require a minimum chimney flue of 5” (125mm),
9105, 9108 and 9112
models
require a minimum chimney flue of 6” diameter (150mm). All chimneys/flues must be a minimum
length of 4 metres and must comply with Building Regulations J. Never share the flue with another
appliance.
If flue and chimney are not to these specifications there could be insufficient draw to pull oxygen
through the appliance to make it burn properly. Due to the low temperature of the exiting flue
gases we recommend that the flue is lined to the diameter specified in the table on page 5.
Larger flues over 200mm particularly ones containing voids may affect appliance performance. We
specify particular size flues for efficient operation of our stoves.
If you live in a valley or are surrounded by tall trees or buildings you might experience
downdraught problems where the wind tries to stop the fumes rising up the chimney. An anti-
downdraught cowl might help, but anti-downdraught cowls reduce the draw.
We recommend you seek the advice of a HETAS (0845 634 5626) or NACE (01526 322 555)
registered supplier and installer before purchasing any stove or heating appliance. It may be wise
to contact your local chimney sweep before the stove is installed.
Flue Pipe
We recommend 1mm stainless steel pipe sprayed matt black. Only use vitreous enamel pipe if it is
stainless steel as mild steel can corrode over time.
Hearths
The stove must stand on a non-combustible surface. Installation standards dictate that hearths
must be at least 12mm thick, but installers must take into account the weight of the stove on such
thin material.
The hearth should extend a minimum of 225mm in front of the stove. When a stove is freestanding
the hearth should always extend a minimum of 150mm either side of the stove.
Aeration hole must
be left open for use
in Smoke Control
areas
Aeration hole can be
closed, if not used in
Smoke Control Areas.
