Table of Contents
Advertisement
1.
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
Figure 34.
2.
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
34, 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 12. 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.
3.
A multiple furnace installation may use a group of up to
four terminations assembled together horizontally, as
shown in Figure 26.
EXHAUST
VENT
5"
(127mm)
INTAKE
AIR
18" MAX.
(457mm)
EXHAUST VENT
Inches (mm)
optional intake elbow
Figure 29. Optional Vent Termination for Multiple Unit
Installation of Direct Vent Wall Termination
EXHAUST
VENT
12" (305mm)
Minimum
Above Average
Snow
Accumulation
CLAMP
Figure 30. Direct Vent Concentric Rooftop
Termination
71M80, 69M29 or 60L46 (US)
44W92 or 44W93 (Canada)
31-5000727 Rev. 0
12"
(305mm)
5-1/2"
(140mm)
Front View
12" (305mm) Min.
above grade or
INTAKE
cumulation.
AIR
Side View
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 LARGER VENT
PIPE SIZE TO TERMINATION
8" - 12"
(203mm - 305mm)
Minimum 12" (305mm)
INSULATION (optional)
above chimney top
plate or average snow
accumulation
* SIZE TERMINATION
PIPE PER EXHAUST
PIPE TERMINATION
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 terminates as
illustrated. In any exterior portion of chimney, the exhaust vent
must be insulated.
Figure 26. Direct Vent Application Using Existing
FIELD-PROVIDED
REDUCER MAY BE REQUIRED
TO ADAPT LARGER VENT
PIPE SIZE TO TERMINATION
EXHAUST
VENT
INTAKE
AIR
Figure 27. Direct Vent Concentric Wall Termination
71M80, 69M29 or 60L46 (US)
44W92 or 44W93 (Canada)
2" EXTENSION FOR 2" PVC PIPE
1" EXTENSION FOR 3" PVC PIPE
FURNACE
INTAKE
PIPE
Figure 28. Flush-Mount Side Wall Termination 51W11
Page 31
STRAIGHT-CUT OR
ANGLE-CUT IN DIRECTION
OF ROOF SLOPE *
3" - 8"
EXHAUST VENT
(76mm -
1/2" (13mm)
203mm)
WEATHERPROOF
INSULATION
SHOULDER OF FITTINGS
INTAKE PIPE
PROVIDE SUPPORT
OF PIPE ON TOP PLATE
SHEET
METAL TOP
PLATE
3" - 8"
(76mm -
203mm)
INSULATE
TO FORM
SEAL
Chimney
OUTSIDE
INTAKE
WALL
AIR
12" (305mm) Min.
INTAKE
CLAMP
AIR
above grade or
(Not Furnished)
average snow
accumulation.
GRADE
FURNACE
EXHAUST
4''
PIPE
GLUE EXHAUST
END FLUSH INTO
TERMINATION
FLAT
1-1/2" ACCELERATOR
SIDE
ALTERNATE
INTAKE PIPE
EXTERIOR
PORTION OF
CHIMNEY
EXHAUST
VENT
Advertisement
Table of Contents
