12" (305) MAX. for 2" (51)
20" (508) MAX. for 3" (76)
(unless supported)
G43UF DIRECT VENT APPLICATION
USING EXISTING CHIMNEY
NOTE − Do not discharge exhaust gases directly into any chimney or vent stack. If ver-
tical 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 illus-
trated. In any exterior portion of chimney, the exhaust vent must be insulated.
FIGURE 32
8" − 12"
(203mm − 305mm)
3" − 8"
(76mm−
203mm)
3" − 8"
(76mm−
203mm)
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
MINIMUM 12"
(305mm) ABOVE
ROOF
*SIZE TERMINATION
PIPE PER TABLE 14.
Details of Exhaust Piping Terminations for Non-Direct
Vent Applications
Exhaust pipes may be routed either horizontally through an
outside wall or vertically through the roof. In attic or closet
installations, vertical termination through the roof is pre-
ferred. Figures 33 through 36 show typical terminations.
1. Exhaust piping must terminate straight out or up as
shown. The termination pipe must be sized as listed in
table 14.The specified pipe size ensures proper ve-
locity required to move the exhaust gases away from
the building.
2. On field supplied terminations for side wall exits, ex-
haust piping should extend a maximum of 12 inches
(305mm) beyond the outside wall, unless support is
provided in the horizontal section. See figure 34.
FIGURE 33
NON−DIRECT VENT ROOF TERMINATION KIT
(15F75 or 44J41)
UNCONDITIONED
ATTIC SPACE
3" (76) OR
2" (51) PVC
PROVIDE SUPPORT
FOR EXHAUST LINES
Inches(mm)
12" (305mm)
ABOVE AVE.
SNOW
ACCUMULATION
SIZE TERMINATION
PIPE PER TABLE
14.
FIGURE 34
1/2" (13) ARMAFLEX
INSULATION IN
UNCONDITIONED SPACE
12" (305) Max. for 2" (51)
Unless Supported
PVC REDUCER
1/2" (13)
ARMAFLEX
INSULATION
Inches (mm)
TOP VIEW
NON−DIRECT VENT WALL RING KIT
(15F74)
SIZE TERMINATION
PIPE PER TABLE 14.
FIELD−PROVIDED
REDUCER MAY
BE REQUIRED TO
ADAPT LARGER
VENT PIPE SIZE
TO TERMINATION
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