1. Top Vent - Horizontal Termination - (continued)
Two Elbows
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 7.3).
V1 Minimum | H1 + H2 Maximum | ||
1 ft.** | 305 mm | 1 ft. | 305 mm |
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2 ft.** | 610 mm | 2 ft. | 610 mm |
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3 ft.** | 915 mm | 4 ft. | 1.2 m |
4 ft. | 1.2 m | 6 ft. | 1.8 m |
5 ft. | 1.5 m | 14 ft. | 4.3 m |
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H + H1 Max. =14 ft. (4.3 m)
V + H + H1 Max. = 40 ft. (12.2 m)
See Warning Below**
H2
INSTALLED
HORIZONTALLY
WARNING**
Fire Risk.
•When using
installing first elbow.
•When using
•When using any other cap, a section of vertical pipe (12 inches minimum) MUST be installed prior to attaching a 90° elbow.
V1 H1
Figure 7.5
Heat & Glo • | 27 |