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76
AST 14 C 258/00
SECT. 7
VENT DUCTS AND PIPES
For the air intake/flue gas venting systems, specific, manufacturer approved, condensate
acid-resistant pipes and systems must be used, suitable for condensing boilers.
Flue gas venting pipes are to be installed tilted toward the boiler so that condensate runs
toward the combustion chamber, which is designed for condensate collection and
drainage.
Should the above procedure not be possible, it is necessary to install, in condensate
stagnation areas, devices designed for condensate collection and conveying to the
condensate drain system.
7.1 100/60 CO-AXIAL AIR/VENT DUCTS
Installation type: C13 - C33
Pipe maximum length*
TYPE OF
INSTALLATION
PIPING MATERIAL
KRB 12
KC-KRB 24
KC-KRB 28
Air
intake
Flue gas vent
L max
[m]
L max
[m]
L max
[m]
C13 – C33
aluminium polypropylene
9.0 10.0 9.0
* the first elbow from the boiler is not to be accounted for
Flue fitting load loss
Component
KCK-RB 12 - 24 - 28
[m]
Extension 1 m
1.0
Extension 0.5 m
0.5
90° elbow
1.0
45° elbow
0.5
Roof vent terminal
1.5
Wall terminal kit + 90° elbow
1.5
