4. Rear Vent - Vertical Termination - (continued)
Three Elbows
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| H1 Maximum | V1 Minimum |
| H2 | H1+ H2 Maximum | ||||
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| 1 ft. | 305 mm | 1 ft. |
| 305 mm | 1 ft. | 305 mm | 2 ft. | 610 mm |
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| 2 ft. | 610 mm | 2 ft. |
| 610 mm | 3 ft. | 914 mm | 5 ft. | 1.5 m |
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| 4 ft. | 1.2 m | 3 ft. |
| 914 mm | 4 ft. | 1.2 m | 8 ft. | 4.6 m |
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| 5 ft. | 1.5 m | 4 ft. |
| 1.2 m | 6 ft. | 1.8 m | 11 ft. | 3.4 m |
V2 | 6 ft. | 1.8 m | 5 ft. |
| 1.5 m | 8 ft. | 2.4 m | 14 ft. | 4.3 m | |
8 ft. | 2.4 m | 6 ft. |
| 1.8 m | 9 ft. | 2.7 m | 17 ft. | 5.2 m | ||
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| H1 = 8 ft (2.4 m) Max. V1+ V2+ H1+ H2= 50 ft (15.2 m) Max. | |||||||
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| H1+ H2= 17 ft (5.2 m) Max. |
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H2
V1
Figure 7.19
Three Elbows
V1
H1
H1 | H2 | H3 | V1 Minimum | H1+ H2+ H3 Maximum | ||
* | * | * | 8 ft. | 2.4 m | 4 ft. | 1.2 m |
* | * | * | 9 ft. | 2.7 m | 5 ft. | 1.5 m |
* | * | * | 10 ft. | 3.1 m | 6 ft. | 1.8 m |
*No specific restrictions on this value EXCEPT
V1+ H1+ H2+ H3 cannot exceed 50 ft. (15.2 m) Maximum H1+ H2+ H3 = 6 ft. (1.8 m) Maximum
H3
H2 H1
Figure 7.20 | INSTALLED |
HORIZONTALLY |
Heat & Glo • | 35 |