Horizontal Vent Termination- 3" (75m) Concentric PVC/CPVC Termination
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| G The concentric termination may be shortened, | |
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| but not lengthened from its original factory | |
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| supplied length. | |
3" (75mm) or |
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| Hanger |
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| The concentric termination may only be used | |||||
4" (100mm) |
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| Straps |
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| 1" (25mm) to | for horizontal terminations. | ||||
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Intake* |
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| Strap | 4" (100mm) | G 3" (75mm) or 4" (100mm) PVC or CPVC pipe | |||
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| may be used with the concentric termination. | |
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| Maintain the same vent pipe diameter from the | |
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| 3" (75mm) orSlope vent | Insert Bird Screen *** | water heater flue to the termination. | ||||||
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| in End of Termination | G Do not exceed the maximum vent lengths as | |||||||
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| 4" (100mm) | Upwards | *** Not supplied with | ||||||
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| Exhaust* |
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| water heater, | specified in this section. | |||
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| order separately. | G When using 4" (100mm) pipe, it will be necessary | |
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| to use 4" (100mm) x 3" (75mm) reducing couplings | |
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| and a short section of 3" (75mm) pipe to connect to | |
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| the termination. | |
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| Use no more than a 6" (150mm) section of pipe to | |
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| make the connection between the reducing | |
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| couplings and the termination. | |
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| G There must be a 1" (25mm) to 4" (100mm) clearance | |
| * 4" (100mm) pipe requires the use of a reducing coupling | between the outside wall and the air intake section | |||||||||||
| just prior to the termination. |
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| of the termination as illustrated on the left. | |||||||
No. of | 3" (75mm) PVC or CPVC | 4" (100mm) PVC or CPVC | G Install a securing strap to prevent movement of | ||||||||||
the termination. | |||||||||||||
Elbows | Max. Straight Vent Length** | Max. Straight Vent Length** | G Terminate at least 12" (300mm) above grade or | ||||||||||
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| N / A |
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| N / A | |||||
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| above snow line. | |||||||
| 3 |
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| 16' |
| (4.8m) |
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| 30' (9.0m) | G Terminate at least 7' (2.1m) above a public walkway, | |||
| 2 |
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| 22' |
| (6.6m) |
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| 36' (10.8m) | 6' (1.8m) from the combustion air intake of any | |||
| 1 |
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| 28' |
| (8.4m) |
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| 42' (12.6m) | appliance, and 3' (0.9m) from any other building | |||
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| opening, gas utility meter, service regulator etc. | |||||||
** Not including the concentric termination |
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| G Terminate at least 3' (0.9m) above any forced air | ||||||||||||
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| inlet within 10' (3m), 1' (0.3m) below, 1' (0.3m) | |
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| horizontally from or 1' (0.3m) above any door, | |
Maximum Vent Length Adjustment Dip switches. | window, or gravity air inlet into any building per | ||||||||||||
National Fuel Gas Code ANSI Z223.1/NFPA 54. | |||||||||||||
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<Maximum Vent Length and Reduced Input Configurations> G Slope the horizontal vent 1/4" upwards for every | |||||||||||||
4” Pipe |
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| 12" (300mm). | |||
Vent length*** |
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| Elbows |
| G Use a condensation drain if necessary. | ||||||
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| G In the Commonwealth of Massachusetts a carbon | ||||||||
ft | m | Number of | 0 |
| 1 | 2 | 3 | ||||||
| monoxide detector is required for all side wall | ||||||||||||
| pieces**** |
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| horizontally vented gas fuel equipment. | |||
0 | 0.00 |
| 0 |
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| N /A | 3 | 0% | 3 0% | 4 | |||
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| Please refer to Technical Bulletin TB 010606 for full | ||||||||||
3 | 0.90 |
| 1 |
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| N /A | 3 |
| 3 | 4 | |||
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| installation instructions. |
6 | 1.80 | 2 | N /A | 3 | 4 | 4 |
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9 | 2.70 | 3 | N /A | 3 | 4 |
| 4 |
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12 | 3.60 | 4 | N /A | 4 | 4 |
| 4 |
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15 | 4.50 | 5 | N /A | 4 | 4 |
| 4 |
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18 | 5.40 | 6 | N /A | 4 | 4 |
| 4 |
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21 | 6.30 | 7 | N /A | 4 | 4 |
| 4 |
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24 | 7.20 | 8 | N /A | 4 | 4 |
| 4 |
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27 | 8.10 | 9 | N /A | 4 | 4 |
| 4 |
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30 | 9.00 | 10 | N /A | 4 | 4 |
| 4 |
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33 | 9.90 | 11 | N /A | 4 | 4 |
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| 3 Short length using 4" (100mm) pipe |
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36 | 10.80 | 12 | N /A | 4 | 4 |
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| 4 Long length using 4" (100mm) pipe |
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39 | 11.70 | 13 | N /A | 4 |
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| ****Table assumes straight vent pieces are 3’ (0.9m) each. | |||||||||
42 | 12.60 | 14 | N /A | 4 |
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| Shorter or longer vent pieces may also be used up to the maximum | |||||||||
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| allowed vent length. |
*** Refer to page 13 for 3" pipe Maximum Vent Length Adjustment Dipswitches table.