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Venting Precautions
• Use 100mm (4") diameter Category III vent pipe.
• Maximum vent length
Number of 90
degree elbows
4
3
2
1
* Not including the termination.
• Exceeding the maximum vent length is danger-
ous and may result in bad combustion.
• If possible,don 't install the vent pipe through any
enclosed areas.If necessary,consult the pipe
manufacturer 's instructions for clearances.
• Install the vent terminal so that all exhaust is di-
rected to and all intake air is taken from outdoors.
• In the Commonwealth of Massachusetts a car-
bon monoxide detector is required for all side
wall horizontally vented gas fuel equipment.
Please refer to Technical Bulletin TB 010606 for
full installation instructions.
• Do not store hazardous or flammable sub-
stances near the vent terminal and check that it
is not blocked in any way.
• Slope the intake and exhaust pipes downwards
1/4" for every 300mm (12") towards the termination.
• Use only UL listed Category III venting products.
• Connect the vent pipe firmly so that it will prevent
exhaust gases from leaking.
• Steam or condensed water may come out from
the vent termination. Select the location for the
termination so as to prevent injury or property
damage.
• If this product will be installed in an area where
snow is known to accumulate,protect the vent
termination from blockage by snow drifts or dam-
age from snow falling off of roofs.
44
Maximum
Vent Length*
12m (39')
14m (45')
16m (51')
17m (57')
• Support the vent pipe with hangers at intervals
as required by the vent pipe manufacturer 's in-
stallation instructions.
• Install the vent terminal so that it is easily
accesible for maintenance both from the indoors
and the outdoors.
• If the vent terminal will be installed higher than
the water heater,make the vertical section di-
rectly above the water heater as short as
possible,and slope down to the terminal. Do not
have another vertical section after the horizontal
section begins.
• Make the vertical pipe as short as possible.
• Follow the vent pipe manufacturer's installation
instructions.
• Maintain the same vent pipe diameter all the
way to the end.
• Maintain the following clearances for the
exhaust pipe to combustibles:
Manufacturer and
Product
Noritz N-Vent
Clearances vary by manufacturer, refer to the UL
approved clearances when using materials other
than N-Vent.
• Do not common vent or connect more than
one appliance to this venting system.
• Terminate at least 300mm (12") above grade or
snow line.
• Terminate at least 2.1m (7') above a public
walkway.
• Use a condensation drain if necessary.
Appliance Adapters
When using a vent system other than N-Vent,
an appliance adapter will be required to properly
connect the vent to this appliance. Consult the
manufacturer's instructions for the proper appli-
ance adapter.
Enclosed Unenclosed
Hor. Vert. Hor.
250mm (10") (sides)
100mm
25mm
375mm (15") (top)
(4")
(1")
150mm (6") (bottom)
Vert.
25mm
(1")
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