PRITY GT Instructions For Installation And Operation Manual page 24

EN
The ascending draft or "draw" of the chimney is a result of the combination
between its height and the difference in the temperatures of the flue gasses and the
outside air.
The hot flue gas column in the chimney has smaller weight than the equivalent
external cold air column, so the pressure at the beginning of the hot chimney is smaller
than the external air pressure. This very small pressure difference creates draft.
Weaker draft is a prerequisite for difficult kindling, return of flue gases, and it is
overcome with rapid kindling and burning of dry thin wildly burning sticks and paper.
After lighting the fire and heating up the chimney, its draft increases. For economical
mode and high efficiency after heating the chimney, the draft must be reduced to 5-10
Pa, but so that there is no return of exhaust gases (smoking) with the door closed.
The main causes for poor draft are:

Accumulated soot inside the chimney, which reduce its cross-section
(diameter) and increases the resistance of the rising exhaust (flue) gases;

cracked chimney wall or loose rosette;

loose smoke pipes, or pipes inserted deep into the chimney, thus reducing or
clogging its cross-section;

the use of one chimney with small draft by several stoves at close levels (in
close proximity);

Smoking also occurs when the weather outside has suddenly warmed up –
the hot gasses from lighting the fire cannot flow (escape) through the cold
chimney. In this case a bigger amount of fast burning kindlings (sticks and
paper) are used. The same effect is obtained when trying to kindle a heater
on the first (ground) floor, provided that the same or adjacent chimney is
already being used by another heater on the top floor.

In case of unsealed (not air-tight) ceiling or open windows on an upper floor,
the effect "staircase-chimney" is obtained, creating a reverse draught.

In case of a chimney located in an area of overpressure, obtained from
(caused by) wind.
When properly connected, serviced and maintained, the solid fuel cooker does not
emit toxic fumes into the room. If, however, this occurs due to above causes, to room
is aired and the cause of the smoke must be found and remedied.
Don't burn waste!
Burning garbage leads to unpredictable consequences because, unlike dry wood,
garbage contains various substances that react when burn together. For example,
household waste contains various colored papers and plastics. When you burn them,
you do not destroy them, you only change their chemical composition by adding a
whole cocktail poisons to the flue gases. The result is the same when burning any type
of garbage, only the type of the discarded toxins changes. One of the products when
burning papers and plastics is dioxin – a highly toxic chemical that does not degrade
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