ADURO P2 Manual De Usuario página 50

Insulation material
Max Ø150 mm
Ø80 cm
Inspection doors
Inspection doors
"T" fittings
4.4 Draft
Fumes heat up during combustion, increasing their volume. Their density is therefore lower than the one of
the surrounding colder air.
This difference between the inside and outside temperatures of the chimney results in the chimney draft.
The draft must be stronger than the fume circulation resistance so that all exhaust fumes generated during
combustion inside the stove are drawn upwards through the outlet and the flue pipe. Many weather
conditions affect the vent pipe functioning, such as rain, fog, snow, and wind being the most important as it
can create negative pressure.
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Excess draft causes an increase in the combustion temperature and consequently a loss in stove efficiency.
At the same time the high fuel temperature, due to an excess amount of oxygen, wears down the
combustion chamber sooner than expected. A high chimney draft may also result in vibrations from the
exhaust fan.
On the other hand, poor draft slows down combustion resulting in a decrease in the stove temperature, fume
spillage inside the room, a loss of stove efficiency and dangerous build-up of soot in the flue pipe.
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