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2.3 Air inlet
The attack suction or air intake of the stove is placed rearwardly and is of circular cross section with a diameter of
50 mm. In the room where the stove is installed it must pour a quantity of air at least equal to that required for
combustion; for this reason the combustion air must ensure a flow of air, clean and free of polluting elements, to
satisfy a regular combustion at maximum power without any hindrance or obstruction of the passage section. The
devices ponds must be taken throughout the combustion air from the outside environment and can be installed in
homes or well insulated high energy efficiency.
For it to be soddisfattii requirements of tightness the combustion air inlet must be connected:
A - directly to the outside of the dwelling with an appropriate tube minimum internal diameter of 50 mm and a
maximum length of 1.5 m fitted at the ends of a suitable grid wind protection (curve downwards + insect mesh) and
positioned
B - on the pickup tube air combined with the exhaust pipe.
-
It is recommended to connect the unit to the external air intake pipes and fittings that guarantee
tightness to meet the requirements for the installation of a device pool.
- With the installation of B is an increase in temperature of the exhaust fumes therefore we recommend
to reset the parameters of the stove and check the operation.
2.4 Fume exhaust
The fumes can be exhausted through a connection to a conventional flue or an external duct with double wall or
insulated pipe.
The fume exhaust connections must guarantee a minimum draught of 10 Pa so that the evacuation of fumes is
assured in case of a temporary power failure.
- The installer must check the efficiency and state of the flue and its conformity with the
local, national and European regulations.
- Certified pipes and connections with adequate seals guaranteeing their tightness must be used.
- In case of fire, shut down the stove, promptly call the fire department, and avoid continual attempts
to extinguish it.
- Clean the flue and respective connection at least once a year.
2.4.1Types of installation
Listed below are definitions and requirements for correct installation of an exhaust flue in accordance with Italian
Standard UNI10683:
FLUE : a vertical duct for collecting and expelling, at an appropriate height from ground, the fumes coming from a
single unit and, where permitted, more than than one.
FLUE technical requirements : it must be fumetight, isolated and insulated depending on its use;
- it must have a mainly vertical path with axis deviation < 45°;
- it must be at a suitable distance from flammable materials with insulation or air gap;
- it must preferably have a constant, free and independent round internal section;
- it is advisable for the flue to have an inspectionable chamber for the collection of solid materials
- and any condensate, placed under the beginning of the fume duct.
FLUE CONNECTION or DUCT: duct or connection element between the unit and flue for evacuation of fumes.
DUCT technical requirements: - it must not cross rooms in which the installation of combustion units is not allowed;
- flexible metal tubes or fibre cement pipes are prohibited;
- the use of counter-sloping elements is prohibited;
- horizontal sections must have an upward slope of at least 3°;
- the length of the horizontal section must be minimal and not more than 3 m;
- there must not be more than 3 changes of direction, without the T union;
- with change of direction > 90° a max. of 2 bends can be used with length in horizontal projection not exceeding 2 m.
- the fume duct must have a constant section and allow the recovery of soot.
CHIMNEY CAP : a device placed on the top of the flue to facilitate the dispersion of fumes into the atmosphere.
CHIMNEY CAP technical requirements : it must have a section equivalent to that of the flue;
- it must have a useful section not less than double the internal section of the flue;
- Must prevent the penetration of rain and foreign bodies and in all weather assure the discharge of the combustion
products (presence of a device windproof);
- it must ensure an adequate dilution of fumes and be positioned outside the backflow area;
- it must be without mechanical means of suction.
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