13
Fig.9
Fig. 10
4.5.3 Holes for exhaust tube passage on walls or roof
Once the location of the stove has been decided (section 4.1), you will have to drill the hole for passage
of the fume exhaust tube. This varies depending on the type of installation (therefore on the exhaust
tube diameter, see 4.5.2) and on the type of wall or roof to be crossed (table 3).
The insulator must be of mineral origin (rock wool, ceramic fibre) with a nominal density greater than
80 kg/m3.
Insulation thickness
[mm]
Fume exhaust tube diameter [mm]
Ø120
Diameter of holes to be created [mm]
Wooden wall, or wall which
is flammable or has
flammable parts
100
320
Concrete wall or roof
50
220
Brick wall or roof
30
180
4.5.4 Using a traditional type chimney flue
If you wish to use an already existing chimney flue, it is advisable to have it checked by a professional
chimney sweep to ensure that it is watertight. This is because fumes, being slightly pressurised, could
infiltrate cracks in the chimney flue and invade living spaces. If an inspection finds that the chimney
flue is not perfectly intact, it is advisable to intubate it with new material. If the existing chimney is large,
we recommend inserting a tube with a maximum diameter of 6 in.
It is also advisable to insulate the vent exhaust duct. Figs. 11 and 12 demonstrate the solutions to
adopt if you want to use an existing chimney flue.
