Navien NCB300-28K Installation & Operation Manual page 40

5. Although weather seals can be used, the flue must be
installed that prevents lateral movement. The use of sand
and cement to seal the flue to the fabric opening of the
building would secure the flue as required. The seals can
be put over the securing sand and cement as a decorative
weather seals.
6.2.1 Horizontal Coaxial Removal (Type C
Standard Removal System
Ø60/100 => Max. length: A = 8 m
Ø80/125 => Max. length: A = 27 m
Extended Removal System
A
Ø60/100 => Max. length: A+B-(1 x 90°elbow) = 8-1.3 = 6.7 m
Ø80/125 => Max. length: A+B-(1 x 90°elbow) = 27-2.2 = 24.8 m
)
13
A
Wall
B
Ø60/100 => Max. length: A+B-(1 x 45°elbow) = 8-1 = 7 m
Ø80/125 => Max. length: A+B-(1 x 45°elbow) = 27-1 = 26 m
Pipe Diameter Maximum
(mm) Length (m)
Ø60/100 8
Ø80/125 27
B
A
Equivalent
Elbow
Length (m)
45° 1.0
90° 1.5
45° 1.0
90° 2.2
Flue System 39