Mendip Stoves ASHCOTT WIDE Guide D'utilisation Et Mode D'emploi page 6

FLUE & CHIMNEY CONNECTION TO STOVE
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.
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 not less than 4.5 metres measured ver�cally from the outlet of the stove to the top
of the chimney should be sa�sfactory. Alterna�vely the calcula�on procedure given in BS5854:1980 may
be used as the basis for deciding whether a par�cular chimney design will provide sufficient draught.
Tested Gas flow rates flue gas Flue gas flow
Test flue gas temperature wood @ pascals of pressure
temperatures rate
ASHCOTT WIDE 5.7 g/s 253°C 12
If it is found that there is excessive draught in the chimney then either an adjustable flue damper or
alternately a draught stabiliser should be fi�ed. The adjustable flue damper should not close off the flue
en�rely but should in its closed posi�on leave a minimum con�nuous opening free area of at least 20 %
of the total cross sec�onal area of the flue or flue pipe. Adequate provision e.g. easily accessible soot door
or doors must be provided for sweeping the chimney and the 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 spare parts authorised by the manufacturer.
6 of 40