Green Heating Technology
24
Dimensioning the intake and outlet ducts
In the following table, all the characteristic losses of load of the original fume venting accessories, ex
-
pressed as equivalence in meters (m) are listed.
If additional, original flue accessories, aside from the ones pictured, are used, the total system
length should be calculated considering the sum of the equivalent characteristic losses of load,
expressed in meters in the following table�
In the case where pipes are installed with non-original accessories (this is allowed by the boiler’s C6
type-approval),
but, in any case, absolutely certified for condensation,
the installer must consider the
losses of load specified by the manufacturer of these accessories, dimensioning the suction and dis
-
charge system so that the total loss of load (expressed in Pa) is between the head loss values of the
boiler fan specified in the paragraph "Technical data" on page 47.
Original accessories for all separated systems (advised even for type C6):
Ø60mm
Ø80mm
Connector from boiler to Ø80mm intake pipe
or to adapter from Ø80mm to Ø60mm
0.3 m - 2 Pa
0.8 m - 2 Pa
Connector from boiler to Ø80mm outlet pipe
or to adapter from Ø80mm to Ø60mm
0.7 m - 5 Pa
2.0 m - 5 Pa
Separate system (original accessories):
Adapter from Ø80mm to Ø60mm on intake
0.4 m
—
Adapter from Ø80mm to Ø60mm on outlet
1.7 m
—
Linear section or extension, length 0.5m on intake
0.5 m
0.5 m
Linear section or extension, length 0.5m on outlet
0.5 m
0.5 m
Linear section or extension, length 1m on intake
0.9 m
0.9 m
Linear section or extension, length 1m on outlet
1 m
1 m
Linear section or extension, length 2m on intake
1.8 m
1.8 m
Linear section or extension, length 2m on outlet
2 m
2 m
90° bend on intake
1 m
1 m
90° bend on outlet
1.6 m
1.8 m
45° bend on intake
0.5 m
0.5 m
45° bend on outlet
0.8 m
0.9 m
Intake terminal section
1.4 m
1.6 m
Horizontal outlet terminal section
1.4 m
3.5 m
Vertical outlet terminal section
1.3 m
3.6 m
Original accessories for all coaxial systems (advised even for type C6):
Ø100/60mm
Flanged coaxial connector (starting vertically)
0.2 m - 2 Pa
Coaxial system (original accessories):
Coaxial linear section or extension (length 1 m)
1 m
90° coaxial bend
2 m
45° coaxial bend
1.5 m
Horizontal outlet coaxial terminal
1.5 m
Vertical outlet coaxial terminal Ø125/80mm
(with Ø100/60mm connector)
1 m
