Viessmann Vitodens 200 WB2 Series Technical Data Manual page 28

Venting Option
Equivalent Vent Length
Equivalent vent length calculation example
IMPORTANT
Ensure that the venting system is properly
supported; the Vitodens 200 boiler is not
designed to support the weight of the
venting system.
28
Type of fitting Equivalent length
90º elbow 3 ft./0.9 m
45º elbow 2 ft./0.6 m
Equivalent vent length calculation example
Vitodens 200, WB2 15-60
2 x 90º elbow . . . . . . . . . . . . . . . .
2 x 45º elbow . . . . . . . . . . . . . . . .
3 x vent pipe (0.5 m) . . . . . . .
2 x vent pipe (1 m) . . . . . . . . . . .
Total equivalent length
6 ft./1.8 m
4 ft./1.2 m
4.9 ft./1.5 m
6.6 ft./2 m
21.5 ft./6.5 m