16
VENTING WITH TWO (2) 90
o
ELBOWS
V FT.
H + H
1
(FT.)
1' MIN. (305mm)
5´ MAX. (1.52m)
2' MIN. (610mm)
10´ MAX. (3.1m)
3' MIN. (914mm)
15´ MAX. (4.65m)
4' MIN. (1.22m)
20´ MAX. (6.2m)
V+H+H
1
= 40' MAX.(12.4m)
20´ MAX. (6.2m)
V+V
1
+H
= 40' MAX.(12.4m)
Figure 8. Venting with Two 90° Elbows