Viessmann Vitodens 200 WB2 6-24C Technical Data Manual page 23

Equivalent Vent Length
Equivalent vent length, example 1
Equivalent vent length, example 2
(continued)
Venting Option
Type of fitting Equivalent length
87º elbow/ 1.65 ft./0.5 m
87º inspection tee
45º elbow 1 ft./0.3 m
Equivalent vent length calculation example 1
Vitodens 200, WB2 15-60
2 x 45º elbow
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 x vent pipe (0.5 m)
. . . . . . . . . . . . .
1 x vent pipe (1 m)
. . . . . . . . . . . . . . . . . . . . . . . .
1 x vent termination
. . . . . . . . . . . . . . . . . .
Total equivalent length 10.85 ft./3.3 m
IMPORTANT
Always include vent termination length in
calculations.
Type of fitting Equivalent length
87º elbow/ 1.65 ft./0.5 m
87º inspection tee
45º elbow 1 ft./0.3 m
Equivalent vent length calculation example 2
Vitodens 200, WB2 8-32
2 x 87º elbow
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 x 45º elbow
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 x vent pipe (0.5 m)
. . . . . . . . . . . . .
1 x vent pipe (1 m)
. . . . . . . . . . . . . . . . . . . . . . . .
1 x sliding coupling
. . . . . . . . . . . . . . . . .
1 x vent termination
. . . . . . . . . . . . . . . . . .
Total equivalent length 18.25 ft./5.55 m
IMPORTANT
Always include vent termination length in
calculations.
2 ft./0.6 m
1.65 ft./0.5 m
3.3 ft./1 m
3.9 ft./1.2 m
3.3 ft./1 m
2 ft./0.6 m
4.95 ft./1.5 m
3.3 ft./1 m
0.8 ft./0.25 m
3.9 ft./1.2 m
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