2. Top Vent - Vertical Termination
No Elbow
NOTE: A flue restrictor can only be used in vent runs that include no elbows and exceed 30 ft. total of straight vertical.
V1 = 50 ft. Max. (15.2 m)
V1 = 3 ft. Min. (914mm)
FLUE
RESTRICTOR
FLUE RESTRICTOR
V1
Figure 5.6
Two Elbows
NOTE: A flue restrictor can only be used in vent runs that include no elbows and exceed 30 ft. total of straight vertical.
Note: Must have a 24 inches minimum vertical vent before attaching any elbow to the unit.
| V1 |
| H1 | V2 | |
2 ft |
| 610 mm | 1 ft | 305 mm | * |
3 ft |
| 914 mm | 3 ft | 914 mm | * |
4 ft |
| 1.2 m | 4 ft | 1.2 m | * |
|
|
|
|
|
|
5 ft |
| 1.5 m | 9 ft | 2.7 m | * |
|
|
|
|
|
|
6 ft |
| 1.8 m | 12 ft | 3.7 m | * |
V1 + V2 + H1 = 50 ft (15.2 m) Max.
*No specific restrictions on this value EXCEPT V1 + V2 + H1 cannot exceed 60 ft (18.3 m).
After V1 = 6 ft, then H1 Max.= V1 x 2
Figure 5.7
16 | Heat & Glo • |
