Table of flue gas exhaust duct lengths
COAXIAL SYSTEM
Supplied By www.heating spares.co Tel. 0161 620 6677
FLUE TYPE
C13
Flue gas exhaust and air suction duct
through external wall in the same range
of pressure
C 33
Flue gas exhaust and air suction duct
from outside with roof terminal in the
same range of pressure
C43
Individual or shared flue gas exhaust and
air suction through flue ducting built into
the building
MAX
DIAMETER of
LENGTH
PIPE
equivalency for
45º
elbow
1 m
60/100
36 m
80/15
90º
elbow
10 m
60/100
30 m
80/15
1 m
60/100
4 m
80/15
10 m
60/100
35 m
80/15
1 m
60/100
0 m
80/15
10 m
60/100
0 m
80/15
installation
Length
0.5m
1.0 m
1