Viessmann Vitodens 200-W WB2B Series Installation Instructions Manual page 45

Vitodens Rigid and Flex Venting Systems Installation
Vent Length Requirements
Maximum vent/air intake pipe length - vertical (continued)
Note: For combination of different vent/air intake pipe
diameters, such as Ø 3 in. stainless steel vent with
Ø 2 in. (PP(s), CVPC, PVC, ABS) air intake pipe, the
total equivalent length must be used for the smaller
pipe diameter.
Minimum vent length is 3.3 ft. (1 m).
Vertical Vent Installation:
Vitodens 100-W WB1B 26, 35,
Vitodens 222-F B2TA 19, 35,
Vitodens 222-F B2TB 19, 35,
Vitodens 200-W WB2B 19, 26, 35,
Vitodens 200-W B2HA 19, 28, 35
Vitodens 200-W B2HB 19, 26, 35
Legend
a Equivalent length (exhaust)
b Equivalent length (air intake)
c min. 18 in. / max. 48 in.
d min. 12 in.
e min. 12 in.
f 6 in. over max. local snow level (check with your local
weather office for details)
IMPORTANT
For PP(s) systems, all exhaust vent and air intake piping
and elbows exposed outside, must be UV resistant
polypropylene (supplied by the vent manufacturer).
(continued)
IMPORTANT
All PP(s) vent termination elbows, must be secured in
place as specified by manufacturer.
Vent system
60/100
80/125
100/150
110/160
*(See vent manufacturer's specifications).
Vertical Vent Installation:
Vitodens 200-W WB2B 45, 60, 80, 105,
Vitodens 200-W B2HA 45, 60, 80, 88, 100, 112, 150
Vitodens 200-W B2HB 45, 57
Legend
A Support system
B Flashings
C Exhaust (straight coupling) with screen
D Combustion air intake with screen
Direct Venting (Two-pipe System)
1 ft. (0.3 m)
a (min. distance) *
25 in. (635 mm)
25 in. (635 mm)
30 in. (762 mm)
45