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VENT
PIPE
GUH97M
DIA.
(in.)
2
070
2-1/2
3
2
090
2-1/2
3
2
110
2-1/2
3
135
3
* Kit 51W11 is provided with a 1-1/2" accelerator which must be for all 2 and 2-1/2" PVC installations.
+ Termination kits 44W92 and 44W93 are approved for use in Canadian installations to meet CSAB149.
++ The 44W92 Concentric kit is provided with a 1-1/2" accelerator Which must be installed on the exhaust outlet when this kit is used
with this furnace.
Venting Practices
Piping Suspension Guidelines
NOTE: Isolate piping at the point where it exits the outside wall or
roof in order to prevent transmission of vibration to the structure.
Wall Thickness Guidelines
Figure 14.
507028-03
STANDARD
Outdoor
Outdoor Exhaust
Exhaust
Accelerator
Accelerator
(Dia. X
Length)
Length)
1-1/2" X 12"
2" X 12"
YES
YES
YES
Table 3. Outdoor Termination Kits Usage
Flush
Mount
(Dia. X
Kit
51W11 *
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
1.
In areas where piping penetrates joist or interior walls,
hole must be large enough to allow clearance on all
sides of pipe through center of hole using a hanger.
2.
When furnace is installed in a residence where unit
is shut down for an extended period of time, such
as a vacation home, make provisions for draining
condensate collection from trap and lines.
Exhaust Piping
(Figure 18 and Figure 19)
3.
Route piping to outside of structure. Continue with
installation following instructions given in piping
termination section.
Do not discharge exhaust into an existing stack or
stack that also serves another gas appliance. If vertical
discharge through an existing unused stack is required,
insert PVC pipe inside the stack until the end is even
with the top or outlet end of the metal stack.
The exhaust vent pipe operates under positive pressure
and must be completely sealed to prevent leakage of
combustion products into the living space.
Issue 1809
CONCENTRIC
1-1/2"
2"
Concentric
Concentric
Kit
Kit
71M80
69M29
or
or
+44W92++
+44W92++
YES
YES
YES
YES
YES
YES
YES
YES
YES
CAUTION
CAUTION
3"
Concentric
Kit
60L46
or 44W93+
YES
YES
YES
YES
YES
YES
YES
Page 13 of 66
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