Maximum Vent Length With Increasers; Maximum Vent Length For Vertical Installations; Minimum Vent Length - Viessmann Vitodens 200-W WB2B Series Installation Instructions Manual

Vitodens Rigid and Flex Venting Systems Installation
Vent Length Requirements

Maximum vent length with increasers

Maximum vent length for vertical installations (Vitodens 200-W)
Model No.
System
vent size
Max. vent
ft. (m)
length "a"
Model No.
System
vent size
Max. vent
ft. (m)
length "a"
* 1 If used with increasers 60/100 to 80/125.
* 2 If used with increasers 100/150 or 110/160
* 3 If used with increasers 80/125 to 100/150 or 110/160
(continued)
Vent length "a"
Coaxial increaser for systems
60/100 to 100/150
60/100 to 80/125
80/125 to 100/150, 110/160
Vitodens 100-W WB1B, Vitodens 200-W WB2B,
Vitodens 200-W B2HA, Vitodens 222-F B2TA
WB2B 19, 26
100/150
80/125
or 110/160
40 (12)* 52 (16)*
1 2
B2TA 19, 35
B2TB 19, 35
100/150
80/125
or 110/160
40 (12)* 49 (15)*
1 2
Vertical Vent Installation (Coaxial)
Maximum vent length for vertical installations (Vitodens
100-W)
Model No.
System vent size
Max. vent length "a" ft. (m)
* 1 If used with increasers 60/100 to 80/125.
* 2 If used with increasers 60/100 to 100/150,110/160
Legend
A 87º elbow
B Vent pipe 3.3 ft. (1 m)
C Vent pipe 1.6 ft. (0.5 m)
D Vent termination
WB2B 35
80/125 100/150
34 (10.5)* 49 (15)*
1
B2HA 19, 28, 35
B2HB 19, 26, 35
80/125 100/150
40 (12)* 49 (15)*
1

Minimum vent length

The minimum equivalent vertical vent length for all models
is 4 ft. (1.2 m) (=length of vent termination).
WB1B 26, 35
80/125* 1
98 (30)
WB2B 45
100/150
43 (13)*
2 3
B2HA 45
B2HB 45
100/150
43 (13)*
2 3
100/150* 2
110/160
118 (36)
WB2B 60
100/150
33 (10)*
3
B2HA 60
B2HB 57
100/150
30 (9)*
3
27