30
(1) The chimney can’t have obstacles around 10 m towards
walls or trees. Otherwise, raise it at least 1 m above the
obstacle.
The chimney must exceed the top of the roof at least 1 m.
D49
(1) In the case that there are chimneys placed side by side,
one of them must exceed to the other at least 50 cm in order
to avoid pressure movements among them
D48
The flue must be away from flammable or combustible materials through an appropriate insulation or an air chamber. In the case that they
pass through flammable materials compounds, they should be eliminated.
Inside, it is forbidden that there are pipes of installations or air abduction channels. It is also prohibited to do mobile or fixed openings for
connecting other different equipments.
If we use metallic pipes inside a masonry duct, it is essential that they are well insulated and with appropriate materials (insulating fibre
coatings) in order to avoid the deterioration of the masonry or the interior coating.
4.1.
CONNECTION OF THE STOVE TO THE CHIMNEY
The connection to the stove for the smoke evacuation must be done with rigid aluminized steel pipes or stainless steel pipes.
It is forbidden the use of flexible metallic pipes or fibre cement pipes because they damage the safety of the connection because they
are subject to jerks and breaks, which causes smoke looses
.
The chimney must be fixed hermetical to the smoke outlet of the stove. It should be rectilinear and with a material that supports high
temperatures (minimum 400ºC). It can have a maximum inclination of 45° whereby excessive deposits of condensation produced in the initial
stages of ignition and / or excessive soot formation is avoided. Moreover, it avoids the slowing down of the smoke when it comes out.
The lack of sealing of the connection may cause the malfunction of the equipment.
The internal diameter of the connection pipe should correspond to the external diameter of the chimney of the equipment. This service is
assured by the pipes complying with DIN 1298.
4.2.
CHIMNEY COWL
The chimney draft also depends on the chimney cowl.
The chimney cowl should assure the smoke discharge even during windy days, having into account that it must exceed the top of the roof
(
drawing D50
).
D50
(1) Industrial chimney of
prefabricated elements
that allow a good smoke
extraction.
(2) Traditional chimney. The
proper exit section must be,
at least, two times the interior
section of the chimney, the best
is 2.5 times
3) Chimney with interior cone
smoke deflector.
The chimney cowl must comply with the following requirements:
•
It must have the same interior section of the stove.
•
It must have an usable exit section that is two times the one of the interior of the chimney.
•
It must be constructed so that the rain, snow or any other objet do not enter inside.
•
It must be easily accessible in order to do servicing and cleaning tasks.
It the chimney cowl is metallic, due to its own design adapted to the diameter of the pipe, the smoke discharge is assured. There are different
models of metallic chimney cowl, fixed, anti-return, and rotary or extractor.
5. OUTSIDE AIR INTAKE
For the proper operation of the stove, it is essential that there is air enough for the combustion and re/oxygenation of the environment where it
is installed. In the case of houses built under the requirements of “energy efficiency” with a great degree of air tightness, it is possible that the
air intake is not guaranteed *the fitter must assure compliance with the Technical Building Code. This means that the air must be able to move
for the combustion through some openings connected to the exterior, even when doors and windows are closed. Moreover, it must comply
with the following requirements:
INSTALLATION, OPERATING AND SERVICING INSTRUCTIONS
STOVES
EN
