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Heat & Glo • PIER-HVB-IPI, ST-HVB-IPI • 2006-901 Rev. C • 12/07
24
Figure 19. Venting with three 90° elbows
V
H
H
1
V
1
V
H
H
1
V
1
NATURAL GAS
VENTING WITH THREE 90° ELBOWS
V + V
1
(FT.) H + H
1
(FT.)
90
0
Elbow on top 2.5’ MAX. (64mm)
1' MIN. (305mm) 3' MAX. (914mm)
2' MIN. (610mm) 6' MAX. (1.83m)
3' MIN. (914mm) 9' MAX. (2.7m)
4' MIN. (1.22m) 12' MAX. (3.6m)
5’ MIN. (1.5m) 15’ MAX. (4.5m)
6’ MIN. (1.83m) 18’ MAX. (5.5m)
V+ V
1
+ H + H
1
= 50’ MAX. (15.2m)
PROPANE
VENTING WITH THREE 90° ELBOWS
V + V
1
(FT.) H + H
1
(FT.)
90
0
Elbow on top 2’ MAX. (610mm)
1' MIN. (305mm) 2' MAX. (610mm)
2' MIN. (610mm) 4' MAX. (1.22m)
3' MIN. (914mm) 6’ MAX. (1.83m)
4' MIN. (1.22m) 8' MAX. (2.4m)
5’ MIN. (1.5m) 10' MAX. (3.0m)
6’ MIN. (1.83m) 12' MAX. (3.6m)
V+ V
1
+ H + H
1
= 50’ MAX. (15.2m)
H + H
1
= 12’ MAX. (3.6m)
H + H
1
= 18’ MAX. (5.5m)