Rear Vent - Horizontal Termination - (continued)
Two Elbows
H1 Maximum | V1 Minimum |
| H2 | H1 + H2 Maximum | |||||
1 ft. | 305 mm | Back to Back | 1 ft. |
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| 305 mm | 2 ft. | 610 mm | |
90º Elbows |
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2 ft. | 610 mm | 6 in. | 152 mm | 2 ft. |
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| 610 mm | 4 ft. | 1.2 m |
3 ft. | 914 mm | 1 ft. | 305 mm | 2 ft. |
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| 610 mm | 5 ft. | 1.5 m |
3 ft. | 914 mm | 2 ft. | 610 mm | 4 ft. |
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| 1.2 m | 7 ft. | 2.1 m |
3 ft. | 914 mm | 3 ft. | 914 mm | 9 ft. |
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| 2.7 m | 12 ft. | 3.7 m |
3 ft. | 914 mm | 4 ft | 1.2 m | 18 ft. |
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| 5.5 m | 20 ft.* | 6.1 m* |
V1 + H1 + H2 = 40 ft (12.2 m) Maximum | H1 | = 3 ft (914 mm) Maximum | |||||||
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| *H1 + H2 = 20 ft (6.1 m) Maximum |
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H2
Figure 7.15
Three Elbows
INSTALLED
HORIZONTALLY
V1
H1
H1 Maximum | V1 Minimum | H2+ H3 | H1+ H2+ H3 Max. | |||||
1 ft. | 305 mm | Back to Back | 1 ft. | 305 mm | 2 ft. | 610 mm | ||
90º Elbows | ||||||||
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2 ft. | 610 mm | 6 in. | 152 mm | 1.5 ft. | 457 mm | 3.5 ft. | 1.1 m | |
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3 ft. | 914 mm | 1 ft. | 305 mm | 2 ft. | 610 mm | 5 ft. | 1.5 m | |
3 ft. | 914 mm | 2 ft. | 610 mm | 4 ft. | 1.2 m | 7 ft. | 2.1 m | |
3 ft. | 914 mm | 3 ft. | 914 mm | 9 ft. | 2.7 m | 12 ft. | 3.7 m | |
3 ft. | 914 mm | 4 ft. | 1.2 m | 12 ft. | 3.7 m | 15 ft. | 4.6 m | |
V1+ H1+ H2+ H3= 40 ft (12.2 m) Maximum | H1= 3 ft (914 mm) Maximum | |||||||
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| H1+ H2+ H3= 20 ft (6.1 m) Maximum |
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H3H2
V1
H1
Figure 7.16
Heat & Glo • | 31 |