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8.
Vent Pipe Installation
CARBON MONOXIDE POISONING
Follow all vent system requirements in accordance with relevant local or state regulation,
or, in the absence of local or state code, in the U.S. to the National Fuel Gas Code ANSI
Be sure to do
Z233.1/NFPA 54 – latest edition, and in Canada, in accordance with the Natural Gas and
Propane Installation Code CSA B149.1 – latest edition.
General Requirements
• The venting system shall be installed in accordance
with the water heater manufacturer's instructions
and, if applicable, the venting system manufacturer's
instructions.
• This is a Category IV appliance.
Only vent materials approved for use with
Category IV appliances should be used.
• Under normal conditions, this appliance will
not produce an exhaust flue temperature
in excess of 149°F (65°C) and schedule 40
PVC pipe may be used as the vent material.
If required by local code, use schedule 40 or
80 CPVC.
Refer to page 14 for additional requirements.
• Make sure the vent system is gas tight and
will not leak.
• Support the vent pipe with hangers at regular
intervals as specified by these instructions or
the instructions of the vent manufacturer.
• All piping must be fully supported. Use pipe
hangers at a minimum of 3 ft (0.9 m) intervals.
Do not use the Water Heater to support the
vent piping.
• Do not common vent or connect more than
one appliance to this venting system.
• The total vent length including horizontal & vertical
vent runs should be no less than 3' (0.9m).
• Do not store hazardous or flammable substances
near the vent termination and check that the
termination is not blocked in any way.
• Steam or condensed water may come out
from the vent termination. Select the location
for the termination so as to prevent injury or
property damage.
• If snow is expected to accumulate, take care
the end of the pipe is not covered with snow
or hit by falling lumps of snow.
12
(Indoor Installation Only)
WARNING
• The vent for this appliance shall not terminate:
i) over public walkways; or
ii) near soffit vents or crawl space vents or
other areas where condensate or vapor
could create a nuisance or hazard or
cause property damage; or
iii) where condensate vaper could cause
damage or could be detrimental to the
operation of regulators, relief valves, or
other equipment.
Maximum Vent Lengths
• This appliance has been designed to be vented
with either 3" (75mm) or 4" (100mm) PVC or
CPVC pipe.
Do not exceed the following maximum vent lengths:
Pipe diameter
No. of Elbows
6
5
4
3
2
1
* Not including the termination
• Maintain the same vent pipe diameter from the
heater flue to the vent termination. The exhaust
and intake pipes must be the same vent pipe
diameter.
Clearances
PVC or CPVC has been approved for use on this
appliance with zero clearance to combustibles.
3" (75mm)
4" (100mm)
Max. Straight Vent Length*
24' ( 7.2m)
24' ( 7.2m)
30' ( 9.0m)
30' ( 9.0m)
35' (10.8m)
35' (10.8m)
41' (12.6m)
41' (12.6m)
47 (14.4m)
47 (14.4m)
53' (16.2m)
53' (16.2m)
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