VENTING WITH TWO (2) 90
1' MIN. (305mm)
2' MIN. (610mm)
3' MIN. (914mm)
4' MIN. (1.22m)
V+H+H
=
40' MAX. (12.4m)
1
Figure 12. Venting with Two 90° Elbows
V FT.
o
ELBOWS
H + H
(FT.)
1
2' MAX. (610mm)
4' MAX. (1.22m)
6' MAX. (1.86m)
8' MAX. (2.4m)
H+H
=
8' MAX. (2.4m)
1