17
Figure 15. Venting with Two 90° Elbows
1' MIN. (305mm) 2' MAX. (610mm)
2' MIN. (610mm) 4' MAX. (1.22m)
3' MIN. (914mm) 6' MAX. (1.86m)
4' MIN. (1.22m) 8' MAX. (2.4m)
40' MAX. (12.4m) 8' MAX. (2.4m)
V+H+H
1
= H+H
1
=
V FT. H + H
1
(FT.)
VENTING WITH TWO (2) 90
o
ELBOWS
