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FIELD-PROVIDED
REDUCER MAY BE REQUIRED
TO ADAPT LARGER VENT
PIPE SIZE TO TERMINATION
OUTSIDE
WALL
EXHAUST
VENT
INTAKE
CLAMP
AIR
(Not Furnished)
Figure 41. Direct Vent Concentric Wall Termination
71M80, 69M29 or 60L46 (US)
44W92 or 44W93 (Canada)
Figure 42.
Page 32 of 59
1-1/2" (38mm) accelerator
provided on 71M80 & 44W92
kits for -45 and -70 units
INTAKE
AIR
EXHAUST
VENT
12" (305mm) Min.
INTAKE
above grade or
AIR
average snow
accumulation.
GRADE
Issue 1809
8" - 12"
(203MM - 305MM)
Minimum 12" (305MM)
INTAKE PIPE
INSULATION (optional)
above chimney top
plate or average snow
METAL TOP
accumulation
INSULATE
TO FORM
SEAL
* 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 terminate as illustrated. In any
exterior portion of chimney, the exhaust vent must be insulated.
Figure 43. Direct Vent Application Using Existing
Chimney
STRAIGHT-CUT OR
ANGLE-CUT IN DIRECTION
3"-8"
OF ROOF SLOPE
(76MM-203MM)
SHOULDER OF FITTINGS
PROVIDE SUPPORT
OF PIPE ON TOP PLATE
SHEET
ALTERNATE
INTAKE PIPE
PLATE
3" - 8"
(76MM-
203MM)
EXTERIOR
PORTION OF
CHIMNEY
507270-03
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