Maximum Vent Length With Increasers; Minimum Vent Length For Vertical Installations - Viessmann Vitodens 100-W WB1B Series Installation Instructions Manual

Rigid Venting Systems Installation Instructions
Vent Length Requirements

Maximum vent length with increasers

Fig. 27
Table 12 Maximum vent length for vertical installations (Vitodens 200-W)
Model No.
System
vent size
Max. vent ft. (m)
length "a"
* If used with increasers 60/100 to 80/125.
1
* 2 If used with increasers 60/100 to 100/150
* 3 If used with increasers 80/125 to 100/150, 110/160
Minimum vent length
The minimum equivalent vertical vent length for all models
is 4 ft. (1.2 m) (=length of vent termination).
(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 and
Vitodens 200-W, WB2B
WB2B 19, 26
80 100
(125)* 1 (150)* 2
or 110 (160)
39.4 52
(12) (16)
Vertical Vent Installation (Coaxial)
Table 11 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.
* If used with increasers 60/100 to 100/150,110/160
2
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
80 100
(125)* 1 (150)* 2
34 49
(10.5) (15)
WB1B 26, 35
80/125* 1 100/150*
110/160
98 (30) 118 (36)
WB2B 45 WB2B 60
100 100
(150)* 3 (150)* 3
43 33
(13) (10)
2
29