508146-01
Issue 2051
Page 4
3
of 7
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6.
On field-supplied terminations, a minimum distance
between the end of the exhaust pipe and the end of
the intake pipe without a termination elbow is 8” and a
minimum distance of 6” with a termination elbow. See
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
36, 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 24. 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
EXHAUST
VENT
INTAKE
AIR
5-1/2”
(140mm)
Front View
12”
(305mm)
5”
(127mm)
18” MAX.
(457mm)
EXHAUST VENT
INTAKE
AIR
Inches (mm)
Side View
12” (305mm) Min.
above grade or
cumulation.
optional intake elbow
Figure 31. Optional Vent Termination for Multiple Unit
Installation of Direct Vent Wall Termination
Minimum
Above Average
Snow
Accumulation
SHEET METAL STRAP
(Clamp and sheet metal strap
must be field installed to support
the weight of the termination kit.)
FLASHING
(Not Furnished)
CLAMP
FIELD-PROVIDED
REDUCER MAY BE REQUIRED
TO ADAPT LARGER VENT
PIPE SIZE TO TERMINATION
12” (305mm)
INTAKE
AIR
EXHAUST
VENT
Figure 32. Direct Vent Concentric Rooftop
Termination
71M80, 69M29 or 60L46 (US)
41W92 or 41W93 (Canada)
Figure 33. Direct Vent Application Using Existing
Chimney
STRAIGHT-CUT OR
ANGLE-CUT IN DIRECTION
OF ROOF SLOPE *
EXHAUST VENT
1/2” (13mm)
WEATHERPROOF
INSULATION
SHOULDER OF FITTINGS
PROVIDE SUPPORT
OF PIPE ON TOP PLATE
ALTERNATE
INTAKE PIPE
INTAKE PIPE
INSULATION (optional)
EXTERIOR
PORTION OF
CHIMNEY
INSULATE
TO FORM
SEAL
SHEET
METAL TOP
PLATE
8” - 12”
(203mm - 305mm)
* SIZE TERMINATION
PIPE PER EXHAUST
PIPE TERMINATION
SIZE REDUCTION
TABLE
3” - 8”
(76mm -
203mm)
3” - 8”
(76mm -
203mm)
Minimum 12” (305mm)
above chimney top
plate or average snow
accumulation
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 terminates as
illustrated. In any exterior portion of chimney, the exhaust vent
must be insulated.
12” (305mm) Min.
above grade or
average snow
accumulation.
INTAKE
AIR
INTAKE
AIR
INTAKE
AIR
OUTSIDE
WALL
GRADE
CLAMP
(Not Furnished)
FIELD-PROVIDED
REDUCER MAY BE REQUIRED
TO ADAPT LARGER VENT
PIPE SIZE TO TERMINATION
EXHAUST
VENT
EXHAUST
VENT
Figure 34. Direct Vent Concentric Wall Termination
71M80, 69M29 or 60L46 (US)
41W92 or 41W93 (Canada)
2” EXTENSION FOR 2” PVC PIPE
1” EXTENSION FOR 3” PVC PIPE
1-1/2” ACCELERATOR
FURNACE
EXHAUST
PIPE
FURNACE
INTAKE
PIPE
4''
GLUE EXHAUST
END FLUSH INTO
TERMINATION
FLAT
SIDE
Figure 35. Flush-Mount Side Wall Termination 51W11
