ENGLISH
RAIS manual for Rais Q20
8
Convection
Rais stoves are convection stoves. This means that the stove’s back and side panels are
not overheated. Convection means that there is a circulation of air, which ensures that the
heat is distributed more evenly throughout the entire room. The cold air is sucked in at the
base of the stove and up through the convection channel, which runs along the stove’s
combustion chamber. The heated air comes out at the top of the stove, which ensures a
circulation of warm air throughout the room.
The stoves are equipped with cool door handles a Rais special feature which means
you could almost do away with gloves. Be aware, however, that all exterior surfaces
become hot during use so take extreme care.
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 133841 may be used as the basis for deciding whether a
particular chimney design will provide sufficient draught.
Please Note, this appliance has been tested by the manufacturers and works on a 3m
straight flue.
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 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.
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