12
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:
* Not including the termination
Refer to page 16 for max. vent lengths
when using termination VK3-H-PVC.
• Maintain the same vent pipe diameter from the
heater fl ue to the vent termination. The exhaust
and intake pipes must be the same vent pipe
diameter.
8.
Vent Pipe Installation
(Indoor Installation Only)
WARNING
Be sure to do
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
Z233.1/NFPA 54 – latest edition, and in Canada, in accordance with NSCNGPI.
No. of Elbows
Max. Straight Vent Length*
4
N/A
39' (11.7m)
3
16' (4.8m)
45' (13.5m)
2
22' (6.6m)
51' (15.3m)
1
28' (8.4m)
57' (17.1m)
Pipe diameter
3" (75mm) 4" (100mm)
• 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, schedule 40 or 80
CPVC may also be used on this appliance.
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 specifi ed by these instructions or
the instructions of the vent manufacturer.
• 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 sub-
stances 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.
General Requirements
Clearances
PVC or CPVC has been approved for use on this
appliance with zero clearance to combustibles.
