7
GO ECO Range
Issue 01.1 05/17
Where the chimney is believed to have previously served an open fire installation, it is possible
that the higher flue gas temperature from the stove may loosen deposits that were previously
firmly adhered, with the consequent risk of flue blockage. It is therefore recommended that the
chimney be swept a second time within a month of regular use after installation.
If you have any doubts about the suitability of your chimney, consult your local dealer/stockist
or chimney specialist. If there is no existing chimney then either a solid fuel compatible
prefabricated block chimney or a twin-walled insulated stainless steel flue to BS 4543 can be
used. These chimneys must be fitted in accordance with the manufacturer’s instructions and
Building Regulations.
5.2.
Ventilation
Document J of the Building Regulations states that (except in recently built properties) purpose
provided ventilation is not required in England and Wales unless the appliance nominal rated
output is greater than 5kW. Over 5kW 5.5 cm
2
of ventilation (550mm
2
) is required for every kW
output above 5. For example 6.5 kW requires 8.25 cm
2
and 8 kW needs 16.5cm
2
. In any case, if
difficulty in starting the fire or any excessive fuming is experienced, ventilation must be put in
place as required to eliminate these flue problems. If a flue draught stabiliser is fitted then extra
ventilation is required. See Document J of the Building Regulations for detailed guidance
especially in new build properties where purpose provided ventilation may be required.
5.3.
Flue Draught
Typically a flue draught at the flue collar of minimum 2.2mm to a maximum 3.5mm water gauge
(22 to 35 Pascals) is required for satisfactory appliance performance. This relates to 12-25
Pascals at the tapping on EN13240/13229 test rigs. The flue draught should be checked under
fire at high output and, if it exceeds the recommended maximum, a draught stabiliser must be
fitted so that the rate of burning can be controlled to prevent over-firing.
5.4.
Connection to the Chimney
This appliance is not suitable for use in a shared flue.
Whilst 150mm diameter flue or liner is recommended wherever possible, a suitable 5” flexible
flue liner is permitted be used on these stoves providing that they only burn smokeless fuel or
seasoned wood logs with the air limiter fitted in in full accordance with the wood burning
instructions.
An existing fireplace opening can be bricked up or sealed with a register plate. A short length of
suitable quality rigid flue pipe of a minimum 125mm internal diameter may then be used to
connect the stove to the chimney. A maximum of 150mm horizontal flue pipe can be used. This
flue pipe should conform to Building Regulations. If the connecting pipe enters the vertical flue
way at any other angle except vertically, ensure that the pipe end is no closer (along the axis
direction of the pipe) than 76mm to the side or rear chimney walls. Ideally, the old fireplace
should be filled in so that there is a smooth streamlined entry into the flue way. It is essential
that all connections between the stove and chimney-flue are sealed and made airtight with
sealing rope, clamping rings and/or fire cement or heat resisting cement where required.
Both the chimney and flue pipe must be accessible for cleaning and if ANY parts of the chimney
cannot be reached through the stove (with baffle removed), a soot door must be fitted in a
suitable position to enable this to be done.
