Chimney connection
Dunatech boiler must be connected to an individual chimney that will provide at least the minimum draught requested.
The flue canal between the boiler and the chimney should be insulated using a glass wool material. The flue canal to
chimney and chimney must be made of steel or an equivalent material that can be used at temperatures around 400 C
All connections on the flue system must be sealed in order to perform a good combustion and efficiency. The flue
canal must be connected to the chimney using the shortest way and in accordance with the dimensions given in the
following scheme. Horizontal connections and equipments that will increase the pressure loss such as elbows
should be avoided
A vertical single steel piping should not be used as a chimney.
Chimney must be made of one internal and one external
surface. External surface may be made of steel or brick.
For internal surface stainless steel chimney elements should
be preferred against corrosion. The space between internal
and external surfaces of the chimney should be insulated to
prevent condensation in flue gasses.
At the lowest level of chimney, there should be a cleaning
cover which is made of steel, and sealed for any leakage.
The length of flue canal between the boiler and the chimney
should not exceed ¼ height of chimney.
The size of flue canal and chimney should not be less than
the size of the boiler flue gas outlet connection. For the total
height and the minimum internal diameter of the chimney,
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te a d a ete o t e c
ey,
following diagram should be referred in respect with the
boiler output power, if otherwise stated in mandatory regulations.
The heighest level of chimney outside should be in accordance
with the dimensions given in following sketch so as to minimize
the harmful effect of flue gasses on ambient, and to improve
the harmful effect of flue gasses on ambient, and to improve
draught in chimney.
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Summary of Contents for DUNATECH 2012
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