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Chimney
Information for installation
7
Information for installation
7.1
Chimney
7.1.1
Planning and layout
Required chimney diameter
Please note that in partial-load operation the exhaust temperature is lower and the large chimney diameters,
normally used for solid fuel, are no longer ideal. If the cross section is too large, the flue gas no longer safely rises
from the chimney opening and may flow along the roof and sink to the windows of the living quarters.
The flue gas connection on the boiler has two different diameters (see table). The flue gas connection with
DN200 must not be used with this boiler. The flue pipe from boiler to chimney must be executed as per the
requirements in the table. A flue pipe with 2 m length and two 90° bends was assumed for the calculation. The "X"
marks any diameters which may not be used.
Example: eHACK 200 with 8 m chimney height and DN250 flue pipe => a chimney with 30 cm diameter is required.
No cross-sectional taper is permitted, such as a DN250 connection pipe in a chimney with a 20 cm diameter.
Clarify with the chimney sweep
A specialist or a chimney sweep must inspect the
dimensions and suitability of existing chimneys
especially before boiler installation.
Every boiler must have its own chimney
The better the boiler and the chimney are matched, the
greater the energy with which the flue gas exits the
chimney, and therefore the certainty that it will rise up
into the air.
Diameter of the flue pipe from
boiler to chimney
Chimney height above
the boiler room floor
Required chimney diameter in cm
eHACK,
ePE-K
180
eHACK,
ePE-K
200
eHACK,
ePE-K
220
eHACK,
ePE-K
240
DN 200
DN 250
6 m
X
30
a
X
30
a
X
30
a
X
35
a
DN 200
DN 250
7 m
X
30
X
30
a
X
30
a
X
30
a
DN 200
DN 250
8 m
X
30
X
30
X
30
X
30
a
DN 200
DN 250
9 m
X
30
X
30
X
30
X
30
DN 200
DN 250
10 m
X
25
X
30
X
30
X
30
DN 200
DN 250
11 m
X
25
X
25
X
30
X
30
DN 200
DN 250
12 m
X
25
X
25
X
25
X
30
DN 200
DN 250
13 m
X
25
X
25
X
25
X
30
DN 200
DN 250
14 m
X
25
X
25
X
25
X
25
a. For boiler outputs over 30 kW and low chimney heights, a chimney joint tilted 45° can help achieve the required draught of 5 Pa at
full load with acceptable cross-sections (a size smaller than indicated in the table).
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