Navien NCB700-42C Installation & Operation Manual page 34

Condensing combi boiler
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Extended Removal System
A
Ø80/80 => Max. length: A+B+C+D+E+F-(4 x 90°elbow) =
110-(4 x 2.2) = 101.2 m
Pipe Diameter
Maximum
(mm)
Length (m)
Ø80/80
110
D
E
F
B
C
Equivalent
Elbow
Length (m)
90°
2.2
6.4.2 Vertical Dual Duct Removal (Type C
D
B
A
Ø80/80 => Max. length: A+B+C+D-(2 x 45°elbow) =
110-(2 x 1.4) = 107.2 m
Pipe Diameter
Maximum
(mm)
Length (m)
Ø80/80
110
)
83
Minimum 370 mm
C
Equivalent
Elbow
Length (m)
45°
1.4
Flue System
33

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Ncb700-54c

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