12
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*
**1' Min. - 3' Max.
* Adapter not required when
using Noritz N-Vent.
**1' minimum recommended,
but not required. Avoid installing
elbow directly on flue.
• Terminate at least 6' from the combustion air
intake of any appliance, and 3' 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' from a vertical wall or similar obstruc-
tion, terminate above the roof at least 2', but not
more than 6', in accordance with the National
Fuel Gas Code ANSI Z223.1/NFPA 54.
• Provide vertical support every 12' or as required
by the vent pipe manufacturer's instructions.
• Slope the horizontal vent 1/4" for every 12" to-
wards 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 in-
stall two elbows and a horizontal drain tee, a
vertical drain tee may be substituted.
Horizontal Vent Termination
• Terminate at least 12" above grade or
above snow line.
• Terminate at least 7' above a public walk-
way, 6' from the combustion air intake of
any appliance, and 3' from any other
building opening, gas utility meter, ser-
vice regulator etc.
• Terminate at least 3' above any forced air
inlet within 10', 4' below, 4' 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" downwards
for every 12" 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 010606 for full installation in-
structions.
Appliance
Adapter*
Elbow
Hanger
Straps
Wall
Thimble
Termination
**1' Min. - 3' Max.
Slope vent
Downwards
* Adapter not required when
using Noritz N-Vent.
**1' minimum recommended,
but not required. Avoid installing
elbow directly on flue.
