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Connection to the external air intake, Connection of smoke discharge pipe – MCZ Club AIR User Manual

Page 12

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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