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5608 741 - 04
Vitodens Rigid and Flex Venting Systems Installation
Direct Venting (Two-pipe System)
Vent Requirements - Flexible Vent System / Connector Pipes
Additional requirements for UL/ULC-listed flexible vent system / connector pipe vent material
Exhaust vent/air intake connection to boiler
The vent/air intake connection to the Vitodens boiler
must be made according to the table below. The starter
adaptors are intended for a slip fit and slide into the
parallel adaptor or boiler adaptor with a gentle twisting
motion.
For air intake pipe system, one wire mesh screens (bird
screen) must be ordered from Viessmann. These parts
are available in pre-cut diameters of 2 in., 3 in. and 4 in.
Required starter adaptors for CPVC air intake system / PPs vent system
Part
Boiler Model
Diameter
Supplier
Quantity
Parallel Pipe Adaptor WB2B 45, 60
B2HA 45,60
B2HB 45, 57
WB2B 80, 105
B2HA 80, 88, 100, 112, 150
3 in. (80 mm)
3 in. (80 mm)
3 in. (80 mm)
4 in. (100 mm)
4 in. (100 mm)
Viessmann
1
CPVC Starter Adaptor
for Air Intake
WB1B 26, 35,
WB2B 19, 26, 35
B2HA 19, 28, 35
B2HB 19, 26, 35
B2TA 19, 35
B2TB 19, 35
WB2B 45, 60
B2HA 45, 60
B2HB 45, 57
WB2B 80, 105
B2HA 80, 88,100, 112, 150
2 in. (50 mm)
2 in. (50 mm)
2 in. (50 mm)
2 in. (50 mm)
2 in. (50 mm)
2 in. (50 mm)
3 in. (80 mm)
3 in. (80 mm)
3 in. (80 mm)
4 in. (100 mm)
4 in. (100 mm)
Viessmann
1
Wire Mesh Screen
for Air Intake
Termination
WB1B 26, 35
WB2B 19, 26, 35
B2HA 19, 28, 35
B2HB 19, 26, 35
B2TA 19, 35
B2TB 19, 35
WB2B 45, 60
B2HA 45, 60
B2HB 45, 57
WB2B 80, 105
B2HA 80, 88, 100, 112, 150
2 in. (50 mm)
3 in. (80 mm), 4 in. (100 mm) if used
3 in. (80 mm), 4 in. (100 mm) if used
3 in. (80 mm), 4 in. (100 mm) if used
3 in. (80 mm), 4 in. (100 mm) if used
3 in. (80 mm), 4 in. (100 mm) if used
3 in. (80 mm)
3 in. (80 mm)
3 in. (80 mm)
4 in. (100 mm)
4 in. (100 mm)
Viessmann
1
Increaser Adaptor
for Exhaust Pipe
WB1B 26, 35
WB2B 19, 26, 35
B2HA 19, 28, 35
B2HB 19, 26, 35
B2TA 19, 35
B2TB 19, 35
2
b
to 3 in. (60 to 80 mm)
2
b
to 3 in. (60 to 80 mm)
2
b
to 3 in. (60 to 80 mm)
2
b
to 3 in. (60 to 80 mm)
2
b
to 3 in. (60 to 80 mm)
2
b
to 3 in. (60 to 80 mm)
Field
supplied
1
Transition Adaptor
WB2B 80, 105
B2HA 80, 88, 100, 112, 150
4
e
to 4 in. (110 to 100 mm)
4
e
to 4 in. (110 to 100 mm)
Field
supplied
1
Note:
The Vitodens boiler has passed the zero inches vent
clearance to combustibles testing requirements
dictated by the Harmonized Standard ANSI Z21.13.
CSA 4.9. and therefore is listed for zero clearance
to combustibles when vented with a single pipe
special venting system.
WARNING
The use of vent material other than listed flexible PP(s),
positive pressure vent pipe and fittings can cause property
damage, severe personal injury and/or loss of life.