ENGLISH RAIS - manual for Q-207ConvectionRAIS stoves are convection stoves. This means that the stove’s back and side panels arenot over-heated. Convection means that there is a circulation of air, which ensures thatthe heat is distributed more evenly throughout the entire room. The cold air is sucked inat the base of the stove up through the convection channel, which runs along the stove’scombustion chamber. The heated air pours out at the top of the stove, which ensures acirculation of warm air throughout the room.The stoves are equipped with “cold” door handles – RAIS special feature – which meansyou could almost do away with gloves. Be aware, however, that all exterior surfaces be-come hot during use - so take extreme care.ChimneyThe chimney is the driving force which makes the stove function. In order for the stove toperform satisfactorily the chimney height must be sufficient to ensure the correct draughtof 14 to 18 Pa so as to clear the products of combustion and prevent problems of smokeemanating into the room when firing.NOTE: A chimney height of not less than 4.5 metres measured vertically from the outletof the stove to the top of the chimney should be satisfactory. Alternatively the calcula-tion procedure given in BS 5854:1980 may be used as the basis for deciding whether aparticular chimney design will provide sufficient draught.The outlet from the chimney should be above the roof of the building in accordance withthe provisions of Building Regulations Approved Document J.If installation is into an existing chimney then it must be sound and have no cracks orother faults which might allow fumes into the house. Older properties, especially, mayhave chimney faults or the cross section may be too large i.e. more than 230 mm x 230mm. Remedial action should be taken, if required, seeking expert advice, if necessary. If itis found necessary to line the chimney then a flue liner suitable for solid fuel must be usedin accordance with Building Regulations Approved Document J.Any existing chimney must be clear of obstruction and have been swept clean immedi-ately before installation of the stove. If the stove is fitted in place of an open fire then thechimney should be swept one month after installation to clear any soot falls which mayhave 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 accordancewith Building Regulations Approved Document J or a twin walled insulated stainless steelflue to BS 4543 can be used. These chimneys must be fitted in accordance with the manu-facturer’s instructions and Building Regulations.