Coaxial Systems - Navien LCB700-21RS Installation & Operation Manual

For vertical ducts, the outlet must be at least 60 cm
Note
from any opening.
The dimensions (B, C, D, and E) may be reduced to
25 mm, as long as the flue terminal is extended to
clear any overhangs.
Extended to clear any overhang

6.2 Coaxial Systems

Refer to the following sections for the detailed clearances of the
coaxial system types.
6.2.1 Horizontal Coaxial Removal (Type C
Standard Removal System
Ø60/100 => Max. length: A=20 m
Ø80/125 => Max. length: A=68 m
Gutter
25 mm
)
13
A
B 500 or 1,000
851
140 min.
W all
Extended Removal System
A
Ø60/100 => Max. length: A+B-(1 x 90°elbow) = 20-1.3 = 18.7 m
Ø80/125 => Max. length: A+B-(1 x 90°elbow) = 68-2.2 = 65.8 m
Ø60/100 => Max. length: A+B-(1 x 45°elbow) = 20-1 = 19 m
Ø80/125 => Max. length: A+B-(1 x 45°elbow) = 68-1 = 67 m
Pipe Diameter Maximum
(mm) Length (m)
Ø60/100 20
Ø80/125 68
B
B
A
Equivalent
Elbow
Length (m)
45° 1.0
90° 1.3
45° 1.0
90° 2.2
Flue System 35