16
Vertical Vent Termination- Stainless Steel Materials Only
• Terminate at least 6' from the combus-
tion 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 obstruction, 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.
• A short horizontal section is recom-
mended to prevent debris from falling
into the water heater.
• When using a horizontal section, slope
the horizontal vent 1/4" upwards for
every 12" toward the termination.
• Install a condensation drain if necessary.
Appliance
Adapter
*
Firestop
Firestop/
Support
Roof
Flashing
RainCap
Exhaust
Intake Air
Hanger
Strap
Elbow
1-2'
6'
2'
Min.
* Adapter not required when
**1' minimum recommended,
but not required. Avoid installing
elbow directly on flue.
**1' Min.
Roof
Jack
Storm
Collar
using Noritz N-Vent stainless
steel vent pipe.
Slope vent
Upwards
(Combustible material)
Intake pipe
External wall,
combustible material
• Inspection openings are suggested for the vent intake and exhaust
pipes if they are installed in an enclosure. These openings should
be near the entrance and exit of the vent into the enclosure.
• These openings should be 18" x 18".
Suggested inspection openings (18" x 18")
When the intake/exhaust pipes pass through an enclosed space:
Ceiling
Sloping down toward vent terminal
Exhaust pipe
