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outside to avoid phenomenon of condensate and to decrease the effect of fumes cooling. It must be
separated from materials that are combustible or easily inflammable by means of air space or insulating
materials. The chimney fireplace throat must be located in the same room where the appliance is
installed or at least in the next room and underneath it there must be a chamber to collect solid residuals
and condensate with a height not inferior to 50 cm and accessible through an airtight metal door. An
expert stove setter should verify the chimney flue efficiency and if it is necessary the chimney flue must
be ducted with materials in accordance to the standards in force. Auxiliary extractor fans can’t be
installed along the chimney or on the chimney pot.
Height – chimney draught
The chimney flue draught depends also on its height. The draught, which is necessary for the different
models of pellets stoves, is 8pa to 14pa (0,08 to 0,14mbar).
Dimensions
The section can be round (which is the best shape), square or rectangular (the ratio between the inner
sides must be
1,5) and the linked sides must have a minimum radius of 20 mm. The section
dimensions must be equal to or bigger than the diameter of the fumes waste pipe (8cm). Hereunder you
can see the dimensions table (see pic. 2).
Type of system
Pipe Diameter 8 cm
Pipe Diameter 10 cm
Minimum length
1.5
2
Maximum vertical length (with 1 pipe tee)
6.5
10
Maximum length (with 3 pipe tees)
4.5
8
Maximum number of bends or pipe tees
3
4
Horizontal stretches (minimum gradient 5%)
2
2
Installation at altitudes over 1200 m above sea
level
NO
Compulsory
Pic. 2
Chimney pot
The chimney pot is really important for a good functioning of a heating appliance, we recommend a
chimney pot, which is wind resistant with wing profiles (see picture 3).
Pic. 3