6 of 28
5.1/5.0 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 installation is into an existing chimney then it must be sound and
have no cracks or other faults which might allow fumes into the house. Older properties especially, may have
chimney faults or the cross section may be too large.
Mendip Stoves recommend the use of a solid fuel flue lining system for all installation into existing chimneys.
All chimney systems must be used in accordance with Building regulations Approved Document J.
If an existing chimney is used the chimney must be clear of obstruc�on and be swept clean immediately
before installation 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 installation to
clear any soot falls which may have occurred due to the difference in combustion between the stove and the
open fire. If there is no existing chimney then either a prefabricated block chimney in accordance with Building
regulations 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 instructions and Building regulations. A single wall metal
flue pipe is suitable for connecting the stove to the chimney but is not suitable for using for the complete
chimney. The connecting 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 connecting
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/smokeless brique�ed fuel
Test flue gas temperature wood /
smokeless brique�ed fuel
@ pascals of pressure
Loxton 5 DC
5.1/5.0 g/sec
238/248 °C
12 pa
Loxton 5 Logstore DC
238/248 °C
12 pa
Chimney Connec�on
In order for the stove to perform satisfactorily the chimney height must be sufficient to ensure an adequate
draught to clear the products of combustion 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 BS5854:1980
; 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
connecting 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.
