ROTEX Heating Systems GmbH
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5.5.3
Permitted pipe lengths at parallel air supply and flue tube systems
Permitted pipe lengths when applying Ø80 mm.
C13
C33 (*) C43
C53
C83
RHOB12AAV1
100 m
100 m
100 m
100 m
100 m
RHOB18AAV1
100 m
100 m
100 m
100 m
100 m
RHOB42AAV1
60 m
60 m
-
60 m
-
(*) Under certain conditions, a greater total length is possible.
Also see par. 5.5.9
In case of greater or smaller pipe diameters, the permissible pipe length is greater or
smaller respectively. In case of smaller diameters, the following applies:
Ø70: 0.59x the permitted pipe length for Ø80
Ø60: 0.32x the permitted pipe length for Ø80
Ø50: 0.15x the permitted pipe length for Ø80
Contact the manufacturer for test calculations for the resistance of the air supply and
combustible gas outlet pipe and the wall temperature at the end of the combustible gas
outlet pipe.
Replacement lengths
Bend 90°
R/D=1
2 m
Bend 45°
R/D=1
1 m
Knee 90°
R/D=0.5
4 m
Knee 45°
R/D=0.5
2 m
Calculation example
Pipe
Pipe lengths
Pipe length total
Flue gas outlet
L1 + L2 + L3 + 2x2 m
13 m
Air supply
L4 + L5 + L6 + 2x2m
12 m
Note:
The total pipe length is: sum of the straight pipe l sum of the replacement pipe
lengths of bends/knees amounts to a total of 25 meters. If this value is less than the
maximum permitted pipe length, the flue gas outlet meets the requirements on this point.
5.5.4
Passage, materials and insulation
CZ
FR
DE
IT
BE
SP
UK
PL
C13
all materials
C33
all materials
C53
all materials
C43
all materials
C63
all materials
(2)
(1)
(1)
(1)
(2)
(1)
(1)
(2)
C83
all materials
C93
all materials
(1)
Gas exhaust/air intake parts can be bought from a 3rd party.
All parts purchased from an external supplier MUST comply with
EN14471.
(2)
NOT allowed
Rotex
Rotex
supplier per country
Rotex
Rotex
Rotex
Rotex
