21
VENTING WITH THREE (3) 90° ELBOWS
V (FT.)
H
(FT.)
1' MIN. (305mm)
3' MAX. (914mm)
2' MIN. (610mm)
6' MAX. (1.86m)
3' MIN. (914mm)
9' MAX. (2.7m)
4' MIN. (1.22m)
12' MAX. (3.6m)
17' MAX. (5.1m)
NOTE: H + H
1
= 17' MAX. (5.1m)
V + V
1
+ H + H
1
= 37' MAX. (11.3m)
VENTING WITH THREE (3) 90° ELBOWS
V (FT.)
H + H
1
(FT.)
1' MIN. (305mm)
3' MAX. (914m)
2' MIN. (610mm)
6' MAX. (1.86m)
3' MIN. (914mm)
9' MAX. (2.7m)
4' MIN. (1.22m)
12' MAX. (3.6m)
17' MAX. (5.1m)
NOTE: V + V
1
+ H + H
1
= 37' MAX. (11.3m)
Figure 15. Venting with three 90° elbows
H
1
H
V
1
V
V
1
H
1
H
V