Navien NCB-20LHWE, Installation & Operation Manual

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6.3.2 Vertical Coaxial Removal (Type C
33
)
Standard Removal System
Ø80/125 => Max. length: A=70 m
Ø60/100 => Max. length: A=21 m
A
A
Extended Removal System
Ø80/125 => Max. length: A+B-(1 x 45°elbow) = 70-1 = 69 m
Ø60/100 => Max. length: A+B-(1 x 45°elbow) = 21-1 = 20 m
A
B
Minimum 350 mm
Pipe Diameter
(mm)
Maximum
Length (m)
Elbow
Equivalent
Length (m)
Ø60/100 21
45° 1.0
Ø80/125 70
6.4 Dual Duct Systems
6.4.1 Horizontal Dual Duct Removal (Type C
53
)
Standard Removal System
Ø80/80 => Max. length: A+B+C-(1 x 90°elbow) = 110-2.2 = 107.8 m
C
B
A
31 Flue System