1. Top Vent - Horizontal Termination
WARNING
Fire Risk. Explosion Risk.
Do NOT pack insulation or other combustibles between ceiling firestops.
•ALWAYS maintain specified clearances around venting and firestop systems.
•Install wall shield and ceiling firestops as specified.
Failure to keep insulation or other material away from vent pipe may cause fire.
1. Top Vent - Horizontal Termination
One Elbow
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| Note: Must have a 24 inches minimum |
Note: Flue restrictor is permit- |
| vertical vent before attaching any |
ted ONLY on 30 ft. minimum |
| elbow to the appliance. |
vertical runs with no elbows. |
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V1
H1
V1 Minimum | H1 | Maximum | ||
2 ft | 610 mm | 7 in* |
| 178 mm |
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3 ft | 914 mm | 2 ft |
| 610 mm |
4 ft | 1.2 m | 4 ft |
| 1.2 m |
5 ft | 1.5 m | 9 ft |
| 2.7 m |
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6 ft | 1.8 m | 12 ft |
| 3.7 m |
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7 ft | 2.1 m | 14 ft |
| 4.3 m |
10 ft | 3.0 m | 20 ft |
| 6.1 m |
20 ft | 6.1 m | 40 ft |
| 12.2 m |
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After V1= 6 ft then H1 = 2 x V ft Maximum
V1 + H1 = 60 ft Maximum
*when used with approved termination caps
Figure 7.3
Two Elbows
Note: Flue restrictor is permit- |
| Note: Must have a 24 inches minimum |
ted ONLY on 30 ft. minimum |
| vertical vent before attaching any |
vertical runs with no elbows. |
| elbow to the appliance. |
|
|
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H2 | V1 | |
H1 | ||
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V1 Minimum | H1+ H2 | ||
3 ft | 914 mm | 18 in | 457 mm |
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4 ft | 1.2 m | 3 ft | 914 mm |
5 ft | 1.5 m | 7 ft | 2.1 m |
6 ft | 1.8 m | 10 ft | 3.0 m |
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7 ft | 2.1 m | 12 ft | 3.7 m |
10 ft | 3.0 m | 18 ft | 5.5 m |
20 ft | 6.1 m | 20 ft | 6.1 m |
After V1= 6 ft then H1 = 2 x V1 ft Maximum
V1 + H1 + H2= 60 ft Maximum
H1 + H2= 20 ft Maximum
INSTALLED
HORIZONTALLY
Figure 7.4
Heat & Glo • | 27 |