Figure #7
Vertical Venting Application Using B or BH Venting
UL Listed Cap
Required
Flashing
B or BH type vent using double wall vent
with double wall connectors is required. Reference local and/or national codes before installation of the vent.
Horizontal run |
| 4" minimum air | |
1/4"rise per ft |
| space required | |
Exhaust venting | Condensate tee | ||
outlet | |||
required |
| ||
|
| ||
|
| B type double wall vent with | |
Steam Outlet | Trap | double wall connectors required | |
2 FT Min | for category I appliances. | ||
| |||
| 3” Min. | Limitations on horizontal | |
|
| distance when venting with B | |
|
| vent | |
| Condensate tee and | BH type double wall vent with | |
| double wall connectors required | ||
| trap must be installed. | ||
| and all joints are to be air and | ||
| Take the condensate to | ||
| water tight. BH vent is a category | ||
| a floor drain or a | ||
| III appliances | ||
| condensate pump. | ||
|
| ||
Figure # 8
Side Wall Venting Application Using BH Type Only
Wall 
BH type vent using double wall vent with all joints being air and water tight. Reference local and/ or national codes before installing vent
Exhaust venting outlet
Hangers Straps
Nortec vent terminal
Condensate
Tee
Trap
2 ft Min.
Steam Outlet
3” Min.
Condensate tee and trap must be installed. Take the condensate to a floor drain or a condensate pump.
BH type double wall vent with double wall connectors is required for category III appliances
Note: These are guidelines only, follow the local and/or national codes in your respective area.
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