Noritz NR71-SV Guide D'installation page 13

Horizontal Vent Termination
Elbow
Slope vent
Downwards
**0.3m (1') Min. -
0.9m (3') Max.
Appliance
Adapter*
* Adapter not required when
using Noritz N-Vent.
**0.3m (1') minimum recommended,
but not required. Avoid installing
elbow directly on flue.
Vertical Vent Termination
Elbow
**0.3m (1') Min. -
0.9m (3') Max.
Appliance
Adapter*
Hanger
Straps
Wall
Thimble
Rain
Cap
Storm
Collar
Roof
Flashing
Roof
Jack
Firestop/
Support
Firestop
Hanger
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 pub-
lic walkway, 1.8m (6') from the combus-
tion air intake of any appliance, and 0.9m
Termination
(3') from any other building opening, gas
utility meter, service regulator etc.
• Terminate at least 0.9m (3') above any
forced air inlet within 3m (10'), 1.2m (4')
below, 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 equipment. Please refer to Technical
Bulletin TB 010606 for full installation in-
structions.
• 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
required by the vent pipe manufacturer's in-
structions.
• Slope the horizontal vent 1/4" for every 300mm
(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.
13