Top Vent - Vertical Termination
No Elbow
Note: A fl ue restrictor can only be used in vent runs that in- clude no elbows and exceed 30 ft. total of straight vertical.
V1 = 50 ft. Max. (15.2 m)
V1 = 3 ft. Min. (914 mm)
FLUE
RESTRICTOR
FLUE 
RESTRICTOR
V1
Figure 7.6
Two Elbows
Note: Must have a 24 inches mini- mum vertical vent before attaching any elbow to the unit.
Note: A fl ue restrictor can only be used in vent runs that in- clude no elbows and exceed 30 ft. total of straight vertical.
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| V1 |
| H1 |
| V2 | ||
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| 2 ft. |
| 610 mm | 1 ft. | 305 mm |
| * | |
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| 3 ft. |
| 914 mm | 3 ft. | 914 mm |
| * | |
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| 4 ft. |
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| 1.2 m | 4 ft. | 1.2 m |
| * |
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| 5 ft. |
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| 1.5 m | 9 ft. | 2.7 m |
| * |
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| 6 ft. |
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| 1.8 m | 12 ft. | 3.7 m |
| * |
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| V1 + V2 + H1 = 50 ft. (15.2 m) Max. |
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| *No specifi c restrictions on this value EXCEPT | |||||||
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| V1 + V2 + H1 cannot exceed 60 ft. (18.3 m). |
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V2 |
| After V1 = 6 ft., then H1 Max.= V1 x 2 |
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H1
V1
Figure 7.7
Heat & Glo • | 27 |
