6 of 28
5.3/7.1 g/sec
The outlet from the chimney should be above the roof of the building in accordance with the provisions
of Building Regula�ons Approved Document J. If installa�on is into an exis�ng chimney then it must be
sound and have no cracks or other faults which might allow fumes into the house. Older proper�es, especially,
may have chimney faults or the cross sec�on may be too large.
Mendip Stoves recommend the use of a solid fuel flue lining system for all installa�on into exis�ng chimneys.
All chimney systems must be used in accordance with Building Regula�ons Approved Document J.
If an exis�ng chimney is used the chimney must be clear of obstruc�on and be swept clean immediately before
installa�on of the stove. The chimney should be tested to confirm the chimney will provide the correct
chimney pressure for the stove.
If the stove is fi�ed in place of an open fire the chimney should be swept one month a�er installa�on to
clear any soot falls which may have occurred due to the difference in combus�on between the stove and
the open fire. If there is no exis�ng chimney then either a prefabricated block chimney in accordance with
Building Regula�ons Approved Document J or a twin walled insulated stainless steel flue to BS 1856-1 .
These chimneys must be fi�ed in accordance with the manufacturer’s instruc�ons and Building Regula�ons.
A single wall metal flue pipe is suitable for connec�ng the stove to the chimney but is not suitable for
using for the complete chimney. The connec�ng flue pipe must have a minimum diameter of 125 mm and
its dimension should be not less than the size of the outlet socket of the stove. Registered smoke exempt
models with a 125mm collar burning wood only can be installed on a flue of 125mm throughout. Any
bend in the chimney or connec�ng flue pipe should not exceed 45
�
. 90
�
bends should not be used other
than within 150mm of stove rear flue outlet.
FLUE & CHIMNEY CONNECTION TO STOVE
Tested Gas flow rates flue
gas temperatures
Flue gas flow rate
Wood /coal
Test flue gas temperature
wood /coal
@ pascals of pressure
CHURCHILL 5
5.3/7.1 g/sec
245/295 °C
12 pa
CHURCHILL 5 CONVECTION
245/295 °C
12 pa
Chimney Connec�on
In order for the stove to perform sa�sfactorily the chimney height must be sufficient to ensure an adequate
draught to clear the products of combus�on and prevent smoke problems into the room.
A chimney height of 4.5 metres (or more) - measured ver�cally from the outlet of the stove to the top of the
chimney - should provide a sa�sfactory draught. The flue should also not be horizontal for over 150mm without
using
the calcula�on procedure given in BSEN13384-1:2005
; this calcula�on can be used as the basis for
deciding whether a par�cular chimney design will provide sufficient draught.
If it is found that there is excessive draught in the chimney then a draught stabiliser should be fi�ed.
Adequate provision e.g. easily accessible soot door or doors must be provided for sweeping the chimney and
connec�ng flue pipe.
Your appliance needs to be maintained rou�nely, the throat plate/baffle should be cleaned regularly (monthly).
The flue pipe can be cleaned using a flexible brush. Only Use a dry cloth on external surfaces. Over �me the
glass may become dirty, clean with a damp cloth and polish off with a dry cloth. If the stove has not been
used for some �me the flue should be checked for blockages before use.
Do not modify the appliance; only use spares authorised by the manufacturer.
