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7.
If intake and exhaust piping must be run up a side
wall to position above snow accumulation or other
obstructions, piping must be supported. At least one
bracket must be used within 6" from the top of the elbow
and then every 24" (610mm) as shown in Figure 40, to
prevent any movement in any direction. When exhaust
and intake piping must be run up an outside wall, the
exhaust piping must be terminated with pipe sized per
Table 13.The intake piping may be equipped with a 90°
elbow turndown. Using turndown will add 5 feet (1.5m)
to the equivalent length of the pipe.
8.
A multiple furnace installation may use a group of up
to four terminations assembled together horizontally, as
shown in Figure 33.
2" EXTENSION FOR
2" PVC PIPE
1" EXTENSION FOR
3" PVC PIPE
FURNACE
INTAKE
PIPE
Figure 32. Flush-Mount Side Wall Termination Kit
51W11 (US) or 51W12 (Canada)
EXHAUST
VENT
5"
(127mm)
INTAKE
AIR
18" MAX.
(457mm)
EXHAUST VENT
Inches (mm)
optional intake elbow
Figure 33. Optional Vent Termination for Multiple Unit
Installation of Direct Vent Wall Termination Kit
31-5000729 Rev. 0
FURNACE
EXHAUST
PIPE
4''
GLUE EXHAUST
END FLUSH INTO
TERMINATION
1-1/2" ACCELERATOR
(all -45, -070 and -090 units)
12"
(305mm)
5-1/2"
(140mm)
Front View
12" (305mm) Min.
above grade or
INTAKE
cumulation.
AIR
Side View
EXHAUST
VENT
12" (305mm)
Minimum
Above Average
Snow
Accumulation
CLAMP
Figure 34. Direct Vent Concentric Wall Termination
71M80, 69M29 or 60L46 (US)
44W92 or 44W93 (Canada)
FIELD-PROVIDED
REDUCER MAY BE REQUIRED
TO ADAPT DIFFERENT VENT
PIPE SIZE TO TERMINATION
EXHAUST
VENT
INTAKE
AIR
(Not Furnished)
Figure 35. Direct Vent Concentric Wall Termination
71M80, 69M29 or 60L46 (US)
44W92 or 44W93 (Canada)
8" - 12"
(203mm - 305mm)
INTAKE PIPE
Minimum 12" (305mm)
INSULATION (optional)
above chimney top
plate or average snow
accumulation
* SIZE TERMINATION
PIPE PER EXHAUST
INSULATE
PIPE TERMINATION
TO FORM
SIZE REDUCTION
TABLE
NOTE − Do not discharge exhaust gases directly into any chimney
or vent stack. If vertical discharge through an existing unused
chimney or stack is required, insert piping inside chimney until the
pipe open end is above top of chimney and terminate as illustrated.
In any exterior portion of chimney, the exhaust vent must be
insulated.
Figure 36. Direct Vent Application Using Existing
Page 33
1 1/2" (38mm) accelerator
provided on 71M80 & 44W92
kits for -045 and -070 models
FLASHING
INTAKE
(Not Furnished)
AIR
SHEET METAL STRAP
(Clamp and sheet metal strap
must be field installed to support
the weight of the termination kit.)
FIELD-PROVIDED
REDUCER MAY BE REQUIRED
TO ADAPT DIFFERENT VENT
PIPE SIZE TO TERMINATION
1-1/2" (38mm) accelerator
provided on 71M80 & 44W92
kits for -045 and -070 models
OUTSIDE
INTAKE
WALL
AIR
EXHAUST
VENT
12" (305mm) Min.
INTAKE
CLAMP
AIR
above grade or
average snow
accumulation.
GRADE
STRAIGHT-CUT OR
ANGLE-CUT IN DIRECTION
OF ROOF SLOPE *
3" - 8"
EXHAUST VENT
(76mm -
1/2" (13mm)
203mm)
WEATHERPROOF
INSULATION
SHOULDER OF FITTINGS
PROVIDE SUPPORT
OF PIPE ON TOP PLATE
SHEET
METAL TOP
PLATE
3" - 8"
(76mm -
203mm)
SEAL
PORTION OF
Chimney
ALTERNATE
INTAKE PIPE
EXTERIOR
CHIMNEY
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