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3. Rear Vent - Horizontal Termination - (continued)
Two Elbows
H1 Maximum | V1 Minimum | H2 Maximum | H1+ H2 Maximum | ||||
1 ft. | 305 mm | 6 in. | 152 mm | 1 ft. | 305 mm | 1 ft | 305 mm |
2 ft. | 610 mm | 1 ft. | 305 mm | 2 ft. | 610 mm | 3 ft. | 914 mm |
3 ft. | 914 mm | 2 ft. | 610 mm | 4 ft | 1.2 m | 6 ft. | 1.8 m |
3 ft. | 914 mm | 3 ft. | 914 mm | 7 ft. | 2.1 m | 9 ft. | 2.7 m |
3 ft. | 914 mm | 4 ft. | 1.2 m | 10 ft. | 3 m | 12 ft. | 3.7 m |
3 ft. | 914 mm | 5 ft. | 1.5 m | 12 ft. | 3.7 m | 15 ft. | 4.6 m |
3 ft. | 914 mm | 6 ft. | 1.8 m | 15 ft. | 4.6 m | 18 ft. | 5.5 m |
V1+ H1+ H2= 50 ft (15.2 m) Maximum H1= 3 ft (914 mm) Maximum
*H1+ H2= 18 ft (5.5 m) Maximum
H2
Figure 7.15
V1
H1 |
Three Elbows |
| H1 Maximum | V1 Minimum | H2+ H3 | H1+ H2+ H3 | Maximum | ||||
6 in. | 152 mm | 6 in. | 152 mm | 6 in. | 152 mm | 1 ft. |
| 305 mm | ||
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| 1 ft. | 305 mm | 1 ft. | 305 mm | 2 ft. | 610 mm | 3 ft. |
| 914 mm |
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| 3 ft. | 914 mm | 2 ft. | 610 mm | 3 ft. | 914 mm | 6 ft. |
| 1.8 m |
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| 3 ft. | 914 mm | 3 ft. | 914 mm | 6 ft. | 1.8 m | 9 ft. |
| 2.7 m |
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| 3 ft. | 914 mm | 4 ft. | 1.2 m | 9 ft. | 2.7 m | 12 ft. |
| 3.7 m |
INSTALLED | V1+ H1+ H2+ H3= 40 ft (12.2 m) Maximum | H1= 3 ft (94 mm) Maximum | ||||||||
HORIZONTALLY | ||||||||||
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| H1+ H2+ H3= 12 ft (3.7 m) Maximum |
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H3H2
V1
H1
Figure 7.16
Heat & Glo • | 33 |