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Figure 17. Venting with Three 90° elbows
1' MIN. (305 mm) 2' MAX. (610mm) 4' MAX. (1.22m)
2' MIN. (610 mm) 4' MAX. (1.22m) 8' MAX. (2.48m)
3' MIN. (914 mm) 6' MAX. (1.86m) 12' MAX. (3.72m)
4' MIN. (1.22 m) 8' MAX. (2.48m) 16' MAX. (4.8m)
V
1
+V+H+H
1
= 40' MAX. (12.4m)
H = 8' MAX. (2.48m) H+H
1
=16' MAX. (4.8m)
V H H + H
1
1' MIN. (305 mm) 2' MAX. (610 mm) 4' MAX. (1.22m)
2' MIN. (610 mm) 4' MAX. (1.22 m) 8' MAX. (2.48m)
3' MIN. (914 mm) 6' MAX. (1.86 m) 12' MAX. (3.72m)
4' MIN. (1.22 m) 8' MAX. (2.48 m) 16' MAX. (4.8m)
V+H+H
1
+H
2
= 40' MAX. (12.4 m)
H = 8' MAX. (2.48m) H + H
1
+ H
2
= 16' MAX. (4.8m)
V H H + H
1
+ H
2
Use D-Series
components only.
V
1
V
H
1
H
H
V
H
1
H
2
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 9).