Ferroli BLUEHELIX HITECH RRT K 50 Instructions For Use, Installation & Maintenance page 324

Duct diameters and tolerances
Coaxial ducts
Use of flexible and rigid pipes ∅50 and ∅60
The calculation shown in the tables below includes the starting accessories code 041087X0 for
∅50 and code 041050X0 for ∅60.
Flexible pipe
It is possible to use up to 4 m of ∅80 mm flue between the boiler and the change to smaller diam-
eter (∅50 or ∅60), and up to 4 m of ∅80 mm flue on the intake (with maximum length for flues of
∅50 and ∅60).
BLUEHELIX HITECH RRT 28 K 50
∅50
A
∅60
324
BLUEHELIX HITECH RRT K 50
max 4 m max 4 m
Ø80
fig. 38- Layout for ducting only with flexible pipe
22 m MAX
60 m MAX
cod. 3541Z783 - Rev 00 - 03/2024
Separate ducts
Ø80
BLUEHELIX HITECH RRT 34 K 50
17 m MAX
45 m MAX
EN