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10
4.3
The flue gas system consists of a chimney and a flue gas tube. The flue gas tube
connects the pellet heating system to the chimney. The chimney leads the flue gas
from the pellet heating system out into the open.
1. Design of the chimney
The design of the chimney is very important. The chimney must ensure safe exhaust
of the flue gases in all operating conditions of the boiler. The flue system must be
designed in accordance with local regulations or ÖNORM EN 13384-1. The flue pipe
must be insulated and must rise to the chimney and be as short as possible.
Boiler size
Flue gas tube diameter
(at boiler) – [mm]
Chimney diameter
2. Flue gas temperature
Boiler type
Flue gas temperature
rating
Flue gas temperature
partial load
The dewpoint of flue gas with wood pellets (max. 10% water content) is approx. 50°C.
3. Chimney draft
The diameter of the chimney must be selected based on a chimney calculation
according to EN 13 384–1. The suction effect of the chimney draft must extend as far
as the chimney connection. The maximum flow rate that can be drawn through the
chimney limits the maximum performance of the pellet boiler. The boiler performance
must be reduced if the chimney does not possess the necessary cross-section. This
may only be performend by authorised personnel.
Installation Manual
Flue gas system
Easypell 16
130
as per chimney calculation, EN 13384–1
Easypell 16
4 Prerequisites for installing a pellet boiler
Easypell 20
Easypell 25
Easypell 20
Easypell 25
160 °C
100°C
Easypell 32
150
Easypell 32
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