Installation guide

Vertical Vent Installation (Coaxial)
31
Vent Length Requirements
Maximumventlength
Table 16.
Boiler model WB1B
10-26
10-35
WB2B
9-19
9-26
WB2B
9-35
WB2B
17-45
WB2B
17-60
WB2B
30-80
30-105
a (max. length)
60/100 vent
system
ft./m 82/25 30/9 23/7 --- --- ---
80/125 vent
system
ft./m --- --- --- 33/10 20/6 ---
100/150 vent
system
ft./m --- --- --- --- --- 43/13
Do not exceed the maximum vent length.
See page 32 for increased diameter equivalent vent pipe system (see
table 17 and 18).
5368 815 v2.0 b
Fig. 27
a
Vent length “a”