14
Horizontal Vent Termination- 3" Concentric PVC/CPVC Termination
Hanger
Straps
PVC/CPVC
Adapter**
PVC/CPVC
Coupling
** Not supplied with water
heater, order separately.
Slope vent
Upwards
1"
Minimum
Insert Bird Screen
in End of Termination
Strap
*4" pipe requires the use of a reducing coupling just prior to
the termination.
No. of
Elbows
3
30'
2
36'
1
42'
10
***Not including the concentric termination.
'
13'
16'
Max. Straight Vent Length***
3" PVC or CPVC
Max. Straight Vent Length***
4" PVC or CPVC
3" or 4"
Intake*
3" or 4"
Exhaust*
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The concentric termination may be shortened, but
not lengthened from its original factory supplied length.
Terminate at least 12" above grade or above snow line.
Terminate at least 7' above a public walkway, 6' from
the combustion air intake of any appliance, and 3' from
any other building opening, gas utility meter, service
regulator etc.
Terminate at least 3' above any forced air inlet within 10',
1' below, 1' horizontally from or 1' above any door,
window, or gravity air inlet into any building per National
Fuel Gas Code ANSI Z223.1/NFPA 54.
Slope the horizontal vent 1/4" upwards for every 12".
Use a condensation drain if necessary.
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 in structions.
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There must be a minimum of 1" clearance between
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3" or 4" PVC or CPVC pipe may be used with the
concentric termination. Maintain the same vent pipe
diameter from the water heater flue to the termination.
Do not exceed the maximum vent lengths as specified
in this section.
When using 4" pipe, it will be necessary to use 4" x 3"
reducing couplings and a short section of 3" pipe to
connect to the termination.
Use no more than a 6" section pipe to make the
connection between the reducing couplings and the
termination.
the outside wall and the air intake section of the
termination as illustrated on the left.
•
Install a securing strap to prevent movement of
the termination.
N-Vent Stainless Steel Vent Terminal Installation
• Follow the installation instructions included with the vent terminal. It is suggested that the appliance be
vented horizontally through a sidewall. If a vertical vent termination is required, it must follow the
requirements of this section (p.16).
• Install the vent terminal so that all exhaust is directed to and all intake air is taken from outdoors.
• Slope the intake and exhaust pipes downwards 1/4" for every 12" towards the termination.
• Install the vent terminal so that it is easily accessible for maintenance both from the indoors and the
outdoors.
• Terminate at least 12" above grade or snow line.
• Terminate at least 7' above a public walkway.
• Use a condensate drain if necessary.
• In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall hori-
zontally vented gas fuel equipment. Please refer to Technical Bulletin TB 010606 for full installation
instructions.
