Installation guide

Direct Venting (Two-pipe System)
58
Vent Length Requirements (continued)
Maximum vent/air intake pipe length - vertical (continued)
Note:
For combination of different vent/air intake pipe diameters, such as Ø 3”
stainless steel vent with Ø 2” (CVPC, PVC, ABS) air intake pipe, the total
equivalent length must be used for the smaller pipe diameter.
Maximum of five 90° elbows allowed in the entire vent and air intake system
(see fig. 55).
Minimum vent length is 3.3 ft. / 1m.
Legend
Support system
Flashings
Exhaust (straight coupling) with
screen
Combustion air intake with screen
a Equivalent length (exhaust)
b Equivalent length (air intake)
c min. 18” / max. 48”
d min. 12”
e min. 12”
f 6” over max. local snow level
(check with your local weather
office for details)
5368 815 v2.0 b5368 815 v2.0 b
Vitodens
C
Vertical Vent Installation
Vitodens 100-W and
200-W WB2B 9-19, 9-26, 9-35
d
e
f
D
B
A
a
c
b
Fig. 51
Vertical Vent Installation
Vitodens 200-W WB2B 17-45, 17-60,
30-80, 30-105
b
a
c
e
f
d
Fig. 52
Vitodens