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EXHAUST
VENT
12" (305mm)
Minimum
Above Average
Snow
Accumulation
CLAMP
Figure 40. Direct Vent Concentric Rooftop
Termination
71M80, 69M29 or 60L46 (US)
44W92 or 44W93 (Canada)
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)
507867-02
1 1/2" (38mm) accelerator
provided on 71M80 & 44W92
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
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
(203MM - 305MM)
Minimum 12" (305MM)
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 terminate as illustrated. In any
exterior portion of chimney, the exhaust vent must be insulated.
Figure 43. Direct Vent Application Using Existing
Issue 1922
Figure 42.
ANGLE-CUT IN DIRECTION
3"-8"
(76MM-203MM)
8" - 12"
INTAKE PIPE
SHOULDER OF FITTINGS
INSULATION (optional)
OF PIPE ON TOP PLATE
SHEET
METAL TOP
PLATE
INSULATE
TO FORM
SEAL
Chimney
STRAIGHT-CUT OR
OF ROOF SLOPE
PROVIDE SUPPORT
ALTERNATE
INTAKE PIPE
3" - 8"
(76MM-
203MM)
EXTERIOR
PORTION OF
CHIMNEY
Page 29 of 55
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