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Iron Dog 3 Installation & User Manual August 2013
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.
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 either a prefabricated block chimney in accordance with Building Regulations
Approved Document J 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.
A single wall metal fluepipe is suitable for connecting the stove to the chimney but is not suitable for using for the
complete 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.
Combustible material should not be located where the heat dissipating through the walls of fireplaces or flues could
ignite it. Therefore when installing the stove in the presence of combustible materials due account must be taken of the
guidance on the separation of combustible material given in Building Regulations Approved Document J and also in
these stove instructions.
If it is found that there is excessive draught in the chimney then a draught stabiliser should be fitted. Fitting of a
draught stabiliser will affect the requirement for the permanent air supply into the room in which the stove is fitted in
accordance with Approved Document J (see also combustion air supply).
Adequate provision e.g. easily accessible soot door or doors must be provided for sweeping the chimney and
connecting fluepipe where it is not intended for the chimney to be swept through the appliance, also to permit visual
checks on the integrity of the flue when the appliance is serviced.
Hearth
The hearth should be able to accommodate the weight of the stove and its chimney if the chimney is not independently
supported. The weight of the stove is indicated in the brochure.
The stove should always be installed on a non-combustible hearth of a size and construction that is in accordance with
the provisions of the current Building Regulations Approved Document J.
The clearance distances to combustible material beneath, surrounding or upon the hearth and walls adjacent to the
hearth should comply with the guidance on the separation of combustible material given in Building Regulations
Approved Document J and also in these stove instructions.
If the stove is to be installed on a combustible floor surface, it must be covered with a noncombustible material at least 12mm thick, in accordance with Building Regulations Approved
Document J, to a distance of 30 cm in front of the stove and 15 cm to each side measuring from the
door of the combustion chamber
Combustion air supply
In order for the stove to perform efficiently and safely there should be an adequate air supply into the room in which
the stove is installed to provide combustion air. This is particularly necessary if the room is double-glazed or a flue
draught stabiliser is operating in the same room as the appliance. It may be necessary to increase the air vent size in
property with low air permeability ( <
5.0 m3 /(h.m2).
The provision of air supply to the stove must be in accordance with current Building Regulations Approved Document