17
Figure 16. Venting with three 90° elbows
VENTING WITH THREE (3) 90° ELBOWS
1´MIN. (305mm)
2´MAX. (610mm)
5´MAX. (1.52m)
2´MIN. (610mm)
4´MAX. (1.22m)
10´MAX. (3.1m)
3´MIN. (914mm)
6´MAX. (1.86m)
15´MAX. (4.65m)
4´MIN. (1.22m)
8´MAX. (2.48m)
20´MAX. (6.2m)
V+H+H
1
+H
2
= 40
´
MAX. (12.4 m) H = 8´ MAX. (2.48 m) H+H
1
+H
2
= 20´ MAX. (6.2 m)
V
H
H + H
1
+ H
2
1´MIN. (305mm)
2´MAX. (610mm)
5´MAX. (1.52m)
2´MIN. (610mm)
4´MAX. (1.22m)
10´MAX. (3.1m)
3´MIN. (914mm)
6´MAX. (1.86m)
15´MAX. (4.65m)
4´MIN. (1.22m)
8´MAX. (2.48m)
20´MAX. (6.2m)
V
1
+V+H+H
1
= 40
´
MAX.(12.4 m) H = 8´MAX.(2.48 m) H+H
1
= 20´MAX.(6.2 m)
V H H + H
1
H
1
V
1
H
V
H
1
V
H
2
H
1
NOTE: There MUST be a 25% reduction in total
H when using flex vent except when using the
simple up and out installation (see Figure 6).
