Wood burning stove/cooker
– TERMOROSA DSA
Installation, user and maintenance instructions – EN – Rev.02
27
operation of the appliance: fibrocement, galvanised steel, internal rough and porous surfaces. Picture 5 shows some
sample solutions.
The minimum section must be of 4 dm
2
(for example 20x20cm) for appliances whose conduit diameter is
lower than 200mm, or 6.25dm
2
(for example 25x25cm) for appliances with a diameter greater than 200mm.
The draught created by your flue must be sufficient but not excessive.
A section of the flue that is too large can present a volume too large to heat and therefore difficulty in operation of the
appliance; to avoid this maintain the same section for its entire height. A section that is too small causes a fall in the
draught.
The flue must be at a suitable distance from inflammable or combustible materials by an appropriate
insulation or air gap.
It is forbidden to obstruct inside the tubing of systems or air ducts. It is also forbidden to install adjustable or fixed
openings, on the same, to connect other devices (see chapter 17).
5.1. POSITION OF CHIMNEY CAP
The draught of the flue also depends on the suitability of the chimney cap.
It is therefore essential that, if built by hand, the free air outlet is more than twice the internal section of the flue.
Since it is necessary to exceed the ridge of the roof, the chimney cap must ensure the outflow even in presence of
wind (Picture 6).
The chimney cap must respect the following requirements:
•
have an internal section equivalent to that of the chimney.
•
have useful exit section double to that inside the flue.
•
be built in a way to avoid penetration of rain, snow and any other foreign body into the flue.
•
be easy to inspect, for any maintenance and cleaning.
Picture 6
Picture 7
Picture 8
50 cm
(1) Where two flues are side by side one chimney cap
must be higher by a minimum of 50 cm to avoid pressure
interaction.
(1) Prefabricated industrial
chimney cap optimum
smoke dispersion.
(2) Artisan chimney cap. It
must have minimum free
opening of flue size x 2,
ideally 2.
(3) Steel conical chimney
cap
with
internal
fume
deflector.
(1) There must be no obstruction (wall, tree or high ground) within 10
m of the chimney cap. On the contrary, raise the same by at least 1 m
above the obstacle.
The chimney cap must always be at least 1m above ridge level.
2 m
10 m
1
m
