11
Vertical Vent Termination
Firestop
Firestop/
Support
Roof
Flashing
Roof
Jack
Storm
Collar
Rain
Cap
Hanger
Strap
Elbow
Condensation
Drain (Install
According to
Local Codes)
Appliance
Adapter*
* Adapter not required when
using Noritz N-Vent.
**1' minimum recommended,
but not required. Avoid installing
elbow directly on flue.
**1' Minimum
• 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.
• Enclose exterior vent systems below the roof
line to limit condensation and protect against
mechanical failure.
• When the vent penetrates a floor or ceiling
and is not running in a fire rated shaft, a
firestop and support is required.
• 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 or Natural Gas and
Propane Installation Code CSA B149.1.
• Provide vertical support every 12' (3.6m) or as
required by the vent pipe manufacturer's instructions.
• Slope the horizontal vent 1/4" for every 12"
(300mm) towards the drain tee.
• A short horizontal section is recommended to
prevent debris from falling into the water heater.
• Install a condensation drain in the horizontal
section of the venting. For installations in
tight spaces where there is not enough room
to install two elbows and a horizontal drain
tee, a vertical drain tee may be substituted.
Horizontal Vent Termination
• Terminate at least 12" (300mm) above grade
or above snow line.
• Terminate 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.
• Terminate 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 or Natural Gas
and Propane Installation Code CSA B149.1.
• Slope the horizontal vent 1/4" downwards for
every 12" (300mm) toward the termination.
• 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 0100 for full installation
instructions.
Appliance
Adapter*
Elbow
Hanger
Straps
Wall
Thimble
Termination
**1' Minimum
Slope vent
Downwards
* Adapter not required when
using Noritz N-Vent.
**1' minimum recommended,
but not required. Avoid installing
elbow directly on flue.
