ML193DF DIRECT VENT APPLICATION
USING EXISTING CHIMNEY STRAIGHT−CUT OR
ANGLE−CUT IN DIRECTION
OF ROOF SLOPE *
8" − 12" | 3" − 8" |
| EXHAUST VENT |
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(76mm− |
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(203mm − 305mm) |
| 1/2" (13mm) |
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203mm) |
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| WEATHERPROOF |
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| INSULATION |
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Minimum 12" (305MM) |
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| SHOULDER OF FITTINGS |
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| INTAKE PIPE |
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above chimney top |
| INSULATION (optional) |
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| PROVIDE SUPPORT |
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| OF PIPE ON TOP PLATE |
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plate or average snow |
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| SHEET |
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| ALTERNATE |
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| METAL TOP |
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accumulation |
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| INTAKE PIPE |
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| 3" − 8" |
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| (76mm− |
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| INSULATE |
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| 203mm) |
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| EXTERIOR |
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| TO FORM |
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| PORTION OF |
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| SEAL |
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| CHIMNEY |
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*SIZE TERMINATION PIPE PER TABLE 8.
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 37
Details of Exhaust Piping Terminations for
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 38 through 41 show typical terminations.
1 − Exhaust piping must terminate straight out or up as shown. The termination pipe must be sized as listed in table 8.The specified pipe size ensures proper veloc- ity required to move the exhaust gases away from the building.
2 − On field supplied terminations for side wall exit, ex- haust piping may extend a maximum of 12 inches (305mm) for 2" PVC and 20 inches (508mm) for 3" (76mm) PVC beyond the outside wall. See figure 39.
SIZE TERMINATION
PIPE PER TABLE 8.
12" (305mm) |
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ABOVE AVE. |
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SNOW | 1/2" (13mm) FOAM |
ACCUMULATION | INSULATION |
3" (76mm) OR | UNCONDITIONED | |
2" (51mm) PVC | ||
ATTIC SPACE | ||
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PROVIDE SUPPORT
FOR EXHAUST LINES
NON−DIRECT VENT ROOF TERMINATION KIT
(15F75 or 44J41)
FIGURE 38
| 12" (305mm) MAX. for 2" (51mm) | |
| 20" (508mm) MAX. for 3" (76mm) | |
1/2" (13mm) ARMAFLEX |
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INSULATION IN |
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UNCONDITIONED SPACE | 1/2" (13mm) | |
| ARMAFLEX | |
FIELD−PROVIDED | INSULATION | |
REDUCER MAY |
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BE REQUIRED TO |
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ADAPT LARGER |
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VENT PIPE SIZE | PVC REDUCER | |
TO TERMINATION | 12" MIN. | |
SIZE TERMINATION | ||
(305mm) | ||
PIPE PER TABLE 8. | ||
Above Grade or | ||
| average snow | |
| accumulation |
NON−DIRECT VENT FIELD SUPPLIED WALL TERMINATION OR
(15F74) WALL TERMINATION KIT
FIGURE 39
3 − If exhaust piping must be run up a side wall to position above snow accumulation or other obstructions, pip- ing must be supported every 24 inches (610mm) as shown in figure 40. When exhaust piping must be run up an outside wall, any reduction in exhaust pipe size must be done after the final elbow.
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