PELLET STOVES Chapter 2
INSTALLATION AND USE MANUAL
page 12
Theoretical notions for installation Technical service - Rights reserved MCZ Group S.p.A. - Reproduction prohibited
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2.4. CONNECTION TO THE EXTERNAL AIR INTAKE
It is essential that at least as much air must be able to flow into the
room where the stove is installed as is required for proper combustion
in the appliance and for the ventilation of the room. This can be
effected by means of permanent openings in the walls of the room to
be ventilated, which give onto the outside, or by single or collective
ventilation ducts.
For this purpose, on the external wall near the stove, a hole must be
made with a minimum free cross-section of 100 cm². (equivalent to a
round hole of 12 cm diameter or a square hole 10x10 cm), protected by
a grille on the inside and the outside.
The air intake must also:
communicate directly with the room where the stove is installed
be protected by a grille, metal mesh or suitable guard, as long as
this does not reduce the area below the minimum.
be positioned in such a way as to be impossible to obstruct
It is not compulsory to connect the air intake directly
with the stove (so that it draws air directly from
outside), but it is essential at all events to ensure an
airflow of 50 cubic metres per hour by the use of a
hole of the dimensions given.
See standard UNI 10683.
2.5. CONNECTION OF SMOKE DISCHARGE PIPE
When making the hole for the passage of the smoke discharge pipe, it
is necessary to take into account the possible presence of flammable
materials. If the hole has to pass through a wall made of wood or
thermolabile material, THE FITTER MUST under all circumstances
observe the minimum safe distance from all combustible materials
(value stated on the pipe certification label) and provide any additional
insulation using appropriate materials (thickness 1.35cm with minimum
thermal conductivity of 0.07 W/m°K).
The same is true if the stove pipe must run through vertical or
horizontal stretches passing in proximity (min.20cm) to the heat-
sensitive wall
As an alternative we recommend the use of insulated pipe, which can
also be used on the outside to avoid condensation.
The combustion chamber works in low pressure. The smoke duct for
the discharge of fumes will also be under low pressure when connected
to an efficient flue pipe as directed.
Rear view of a pellet stove
1) Smoke outlet
2) Combustion air intake
