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Dimensioning
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system, it’s necessary to perform
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system in order to verify if the
choosen system is applicable.
The following table shows an
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system, including the maximum
possible length of the system.
This example only give an
indication of the possible length, but
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system has to be calculated by an
authorized company.
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pressure, which doesn’t affect the
burner modulation ratio, is 30 Pa.
Higher negative pressure will lead
to limitation of the burner modulation
ratio.
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is 20 m. With horizontal ways longer
than 20 m, a faultless burner start in
cold condition can not be guaranteed.
Installation
Air/Flue gas system dimensioning
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system
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Length reduction factor
t PHWHUVSHUHDFKEHQG
t 1,5 meters per each 45/43° bend
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system
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Length reduction factor
t PHWHUVSHUHDFKEHQG
t 1 meter per each 45/43° bend
Ø80 Ø100 Ø120 Ø125 Ø130
Lmax
[m]
Lmax
[m]
Lmax
[m]
Lmax
[m]
Lmax
[m]
24 40
13 40
22 33
26 40 40
17 24 40 40
12 17 40
Equivalent length in m
Straight
pipe
Bend R=D
90°/87°
Bend R=D
45°/43°
Ø80
1 1.5 0.8
Ø100
1 1.8 0.9
Ø120
121
Ø125
1 2.2 1
Ø130
1 2.2 1
Ø 100 / 150
7
6
7
Equivalent length in m
Coaxial
pipe
Bend R=D
90°/87°
Bend R=D
45°/43°
Ø100/150
1.5 1
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100 and 120 can be connected to a
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Via a parallel-to-concentric adap-
ter (optional) the boiler can be con-
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t 100/150 concentric system
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lengths.
TH-L 50
TH-L 65 (L)
TH-L 85
TH-L 100
TH-L 120
TH-L 145
TH-L 50
TH-L 65 (L)
TH-L 85
TH-L 100
TH-L 120
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