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14
B004
In calculating the lengths of the
pipes, the maximum length must also
take into consideration the values for
the exhaust/air intake end terminals,
as well as 90° elbows for coaxial
systems.
The C52 types must comply with the
following requirements:
1. The discharge/intake vent pipes
must have the same diameter of ø
80 mm.
2. The maximum combined flue
length is 17 m for Models Genus
23/27 MFFI/RFFI and 15 m for
Model Genus 30 MFFI. In this case
the minimum length for the air
intake pipe is 1 meter; the
maximum length of vertical
exhaust pipe must be a maximum
of 12 m.
3. If an elbow is inserted into the
discharge/ventilation system, the
calculation of the overall extension
must take into consideration the
values for each curve, as indicated
in the table.
4. The exhaust pipe must extend at
least 0.5 m above the ridge of the
roof if it is located on a side other
than that for the air intake (this is
not obligatory if the exhaust and air
intake pipes are located on the
same side of the building).
4 m
4 m
4 m
3 m
3 m
3 m
Maximum Extension
Exhaust/Air
23 kW - 27 kW 30kW
Exhaust Type
Diameter of
Pipes
(mm)
Use of Restrictor on Discharge Side
42 mm 45 mm
23kW 27 kW 30 kW
Risk of Condensation Forming
23kW 27 kW 30 kW
C12 (xx)
C32 (xx)
C42 (xx)
C12 (xy)
C32 (xy)
C42 (xy)
C52 (xy)
Coaxial
Systems
Twin Pipe
Systems
23 kW
54 m
54 m
54 m
17 m
27 kW
46 m
46 m
46 m
17 m
30 kW
50 m
50 m
50 m
15 m
ø 60/100
ø 60/100
ø 60/100
ø 80
ø 80
ø 80
ø 80
L * < 0.5 m
L * < 0.5 m
L * < 0.5 m
L < 7 m
L < 7 m
L < 7 m
L < 7 m
L * < 0.5 m
L * < 0.5 m
L * < 0.5 m
L < 5 m
L < 5 m
L < 5 m
L < 5 m
L * < 0.5 m
L * < 0.5 m
L * < 0.5 m
L < 7.5 m
L < 7.5 m
L < 7.5 m
L < 7.5 m
L > 4.9 m
L > 4.9 m
L > 4.9 m
L > 4.9 m
L > 6.5 m
L > 6.5 m
L > 6.5 m
L < 5.3 m
L > 4.5 m
L > 4.5 m
L > 4.5 m
L > 4.5 m
(*) L = Length of Piping