Vent Pipe Installation (When supplying combustion air from the indoors (SV,
* Dip switch No.3 is turned on.
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Horizontal Vent Termination- PVC/CPVC Materials Only
| 3” Min. |
| Hanger |
Exhaust | Straps |
Intake | Slope vent |
| Insert Bird |
Upwards |
| ||
|
| Screen* in | |
SV Conversion Kit |
|
| |
|
| Each End | |
Accessory |
|
| of Tee |
**1' (0.3m) Minimum | |||
Inlet screen |
| ||
|
|
| |
90 Elbow |
|
|
|
| * Not supplied with water |
| |
| heater, order separately. |
| |
| **1' (0.3m) Minimum |
|
|
| recommended, but not required. |
| |
Pipe Material | PVC or CPVC |
| |
| Max. Straight Vent Length*** |
| |
No. of Elbows | 4" (100mm) Pipe | 3" (75mm) Pipe |
|
4 | 35' (10.8m) | 35' (10.8m) |
|
3 | 41' (12.6m) | 41' (12.6m) |
|
2 | 47' (14.4m) | 47' (14.4m) |
|
1 | 53' (16.2m) | 53' (16.2m) |
|
*** Not including the termination.
CA tee, 45
elbow, or the
CTerminate at least 12" (300mm) above grade or above snow line.
CTerminate at least 7' (2.1m) above a public walkway,
6' (1.8m) from the combustion air intake of any appliance, and 3' (0.9m) from any other building opening, gas utility meter, service regulator etc.
CTerminate at least 3' (0.9m) above any forced air inlet within 10' (3m) , 4' (1.2m) below, 4' (1.2m) horizontally from or
1' (0.3m) above any door, window, or gravity air inlet into any building per National Fuel Gas Code ANSI Z223.1/NFPA 54.
CSlope the horizontal vent 1/4" upwards for every 12" (300mm) toward the termination.
CUse a condensation drain if necessary.
C In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally vented gas fuel equipment.
Please refer to Technical Bulletin TB 010606 for full installation instructions.
C When installed in a manufactured home, all combustion air must be supplied from the outdoors as shown on pages 15 - 17.
Vertical Vent Termination- PVC/CPVC Materials Only
Storm Collar 
Insert Bird
Screen* in
End of 90
Elbow
C Terminate at least 6' (1.8m) from the combustion air intake of any appliance, and 3' (0.9m) from any other building opening, gas utility meter, service regulator etc.
Roof
Flashing
|
| Firestop/Support |
| Support |
|
Exhaust | Hanger | Firestop |
Intake | Strap |
|
|
|
SV Conversion Kit |
| |
Accessory | Slope vent | |
Upwards | ||
Inlet screen | ||
**1' (0.3m) | ||
| ||
| Minimum | |
90 Elbow |
|
* Not supplied with water heater, order separately.
**1' (0.3m) minimum recommended, but not required.
C Enclose exterior vent systems below the roof line to limit condensation and protect against mechanical failure.
C When the vent penetrates a floor or ceiling and is not running in a fire rated shaft, a firestop and support is required.
C When the vent termination is located not less than 8' (2.4m) from a vertical wall or similar obstruction, terminate above the roof at least 2' (0.6m), but not more than 6' (1.87m), in accordance with the National Fuel Gas Code ANSI Z223.1/NFPA 54.
C Provide vertical support every 3' (0.9m) or as required by the vent pipe manufacturer's instructions.
C A short horizontal section is recommended to prevent debris from falling into the water heater.
C When using a horizontal section, slope the horizontal vent 1/4” upwards for every 12” (300mm) toward the termination to drain condensate.
C When installed in a manufactured home, all combustion air must be supplied from the outdoors as shown on pages 15 - 17.
