Contura 750, Installation Instructions Manual, Page: 3 / 28

Chimney
In order for the stove to perform satisfactorily the chimney height must be sufficient to ensure an adequate
draught of approximately 15 Pa so as to clear the products of combustion and prevent smoke problems into the
room.
NOTE: A chimney height of not less than 4.5 metres measured vertically from the outlet of the stove to the top of
the chimney should be satisfactory. Alternatively the calculation procedure given in EN 13384-1 may be used as the
basis for deciding whether a particular chimney design will provide sufficient draught. BS EN 15287-1:2007 gives
additional details.
The outlet from the chimney should be above the roof of the building in accordance with the provisions of Building
Regulations 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
i.e. more than 230 mm x 230 mm. Remedial action should be taken, if required, seeking expert advice, if necessary.
If it is found necessary to line the chimney then a flue liner suitable for solid fuel must be used in accordance with
Building Regulations Approved Document J.
Any existing chimney must be clear of obstruction and have been swept clean immediately before installation of the
stove. If the stove is fitted in place of an open fire then the chimney should be swept one month after 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 any new system must be to the designation described above and in accordance
with Building Regulations Approved Document J.
A single wall metal fluepipe is suitable for connecting the stove to the chimney but is not suitable for use as the com-
plete chimney. The chimney and connecting fluepipe must have a minimum diameter of 150 mm and its dimension
should be not less than the size of the outlet socket of the stove.
Any bend in the chimney or connecting fluepipe should not exceed 45°. 90° bends should not be used.
811142 BAV GB-7 March 2014