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Horizontal Vent Termination
Elbow
**0.3m (1') Min. -
Appliance
Adapter*
Vertical Vent Termination
Elbow
**0.3m (1') Min. -
0.9m (3') Max.
12
Hanger
Straps
Wall
Thimble
Slope vent
Downwards
0.9m (3') Max.
* Adapter not required when
using Noritz N-Vent.
** 0.3m (1') minimum recommended,
but not required. Avoid installing
elbow directly on flue.
Rain
Cap
Storm
Collar
Flashing
Roof
Jack
Firestop/
Support
Hanger
Firestop
Strap
Condensation
Drain (Install
According to
Local Codes)
* Adapter not required when
using Noritz N-Vent.
** 0.3m (1') minimum recommended,
but not required. Avoid installing
elbow directly on flue.
• Terminate at least 300mm (12") above
grade or above snow line.
• Terminate at least 2.1m (7') above a public
walkway, 1.8m (6') from the combustion air
intake of any appliance, and 0.9m (3') from
any other building opening, gas utility meter,
Termination
service regulator etc.
• Terminate at least 0.9m (3') above any
forced air inlet within 3m (10'), 1.2m (4') be-
low, 1.2m (4') horizontally from or 0.3m (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 300m (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 equip-
ment. Please refer to Technical Bulletin TB
010606 for full installation instructions.
Roof
• Terminate at least 1.8m (6') from the combus-
tion air intake of any appliance, and 0.9m (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 2.4m (8') from a vertical wall or similar ob-
struction, terminate above the roof at least 0.6m
(2'), but not more than 1.8m (6'), in accordance
with the National Fuel Gas Code ANSI Z223.1/
NFPA 54.
• Provide vertical support every 3.6m (12') or as re-
quired by the vent pipe manufacturer's instructions.
• Slope the horizontal vent 1/4" for every 300m
(12") 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 in-
stall two elbows and a horizontal drain tee, a
vertical drain tee may be substituted.
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