13
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 Na-
tional 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
walkway, 6' from the combustion air in-
take 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', 4' below, 4' horizontally
from or 1' above any door, window, or grav-
ity 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 Techni-
cal Bulletin TB 010606 for full installation
instructions.
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.
