
26
5608 741 - 04
Vitodens Rigid and Flex Venting Systems Installation
Vertical Vent Installation (Coaxial)
Vent Length Requirements
Boiler model a (max.
length)
B2TA 19, 35
B2TB 19, 35
B2HA
19, 28, 35,
B2HB
19, 26, 35
B2HA 45
B2HB 45
B2HA 60
B2HB 57
B2HA
80, 88, 100
B2HA 112 B2HA 150
60/100
ft. (m)
33 (10)
33 (10)
--
--
--
--
--
80/125
ft. (m)
--
--
33 (10)
20 (6)
--
--
--
100/150 or
110/160
ft. (m)
--
--
--
--
43 (13)
26 (8)*
2
16 (5)*
1
Do not exceed the maximum vent length.
See tables on page 27 for increased diameter equivalent
vent pipe system.
Vent length “a”
*
1
Boilers have an input reduction of 13% with any
coaxial length used.
*
2
Boilers have an input reduction of 5% with
any coaxial length used.
Maximum vent length
Boiler model
a (max.
length)
WB1B 26, 35 WB2B 19, 26
WB2B 35
WB2B 45
WB2B 60
WB2B 80, 105
60/100
ft. (m)
82 (25)
30 (9)
23 (7)
--
--
--
80/125
ft. (m)
--
--
--
33 (10)
20 (6)
-
100/150 or
110/160
ft. (m)
--
--
--
--
--
43 (13)