507581-04Page 16 of 60 Issue 2128
Venting
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 21.
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.
Removal of the Furnace from Common Vent
In the event that an existing furnace is removed from
a venting system commonly run with separate gas
appliances, the venting system is likely to be too large to
properly vent the remaining attached appliances.
Conduct the following test while each appliance is operating
and the other appliances (which are not operating) remain
connected to the common venting system. If the venting
system has been installed improperly, you must correct the
system as indicated in the Vent Piping Guidelines section.
Model
Vent Pipe
Dia.
(in.)
STANDARD CONCENTRIC
Outdoor
Exhaust
Accelerator
(Dia. X Length)
Outdoor
Exhaust
Accelerator
(Dia. X Length)
Flush
Mount
Kit
1-1/2"
Concentric
Kit
2"
Concentric
Kit
3"
Concentric
Kit
1-1/2" x12" 2" x12" 51W11
71M80 or
+44W92++
69M29 or
+44W92++
60L46 or
44W93+
030
045
1
1-1/2 YES YES
2 YES YES YES
2-1/2" YES YES YES
3 YES YES YES
70
1
1-1/2 YES YES
2 YES YES YES
2-1/2" YES YES YES
3 YES YES YES
90
2 YES YES YES YES
2-1/2" YES YES YES YES
3 YES YES YES YES
110
2 YES YES YES YES
2-1/2" YES YES YES YES
3 YES YES YES YES
1
2 inch to 1-1/2 inch reducer required, must be eld provided.
* Requires eld provided end installed 1-1/2” exhaust accelerator.
** Kit 51W11 is provided with e 1-1/2” accelerator, which must be used for all 2 and 2-1/2” PVC installations. When using 1-1/2 in.
piping, the pipe must be transitioned to 2 in. pipe when used with the Flush Mount Kit.
+ Termination kits 44W92, 44W93, 30G28 & 81J20 approved for use in Canadian installations to meet CSA-B149 and ULC S636
++ 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. When using 1-1/2 in. piping, the pipe must be transitioned to 2 in. pipe when used with the Concentric Kit.
Table 3. Outdoor Termination Kits Usage
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