Installation guide

Single Wall Venting (Room Air Dependent)
84
Component Installation Guide (continued)
Equivalent vent length calculation example - vertical
Equivalent vent length calculation
example (stainless steel system)
Vitodens 100-W, WB1B 10-26, 10-35
2 x 90º elbow 6 ft./1.8 m
...........................
2 x 45º elbow 4 ft./1.2 m...........................
3 x vent pipe (0.5 m) 4.9 ft./1.5 m........
2 x vent pipe (1 m) 6.6 ft./2 m................
Total equivalent length 21.5 ft./6.5 m
Above example will change as follows
if using CPVC venting system (see
fig. 73):
2 x 90º elbow 10 ft./3.1 m
....................
2 x 45º elbow 6 ft./1.8 m....................
3 x vent pipe (0.5 m) 4.9 ft./1.5 m.....
2 x vent pipe (1 m) 6.6 ft./2 m.........
Total equivalent length 27.5 ft./8.4 m
Table 53.
Type of fitting Equivalent
length
90º elbow/
90º inspection tee
1.6 ft./0.5 m
45º elbow 1 ft./0.3 m
Note:
See also table 52.
Vent pipe (3.3 ft./1 m)
45º elbow
Vent pipe (1.6 ft./0.5 m)
90º elbow
*1
First pipe not included in
equivalent vent calculation
.
5368 815 v2.0 b5368 815 v2.0 b
Fig. 83 Equivalent vent length calculation example
*1
C
C
C