Allied Air Enterprises 92G1DF, A95DF, A93DF NON−DIRECT Vent Application Using Existing Chimney

Details of Exhaust Piping Terminations for Non-Direct Vent Applications

NON−DIRECT VENT FIELD SUPPLIED WALL

TERMINATION EXTENDED

Exhaust pipe 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 preferred. Figures 34 through 37 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 velocity
	required to move the exhaust gases away from the
	building.
2.	On field supplied terminations for side wall exit, exhaust
	piping may extend a maximum of 12 inches (305 mm)
	for 2” PVC and 20” (508 mm) for 3” (76 mm) PVC beyond
	the outside wall. See Figure 35.
3.	If exhaust piping must be run up a sidewall to position
	above snow accumulation or other obstructions, piping
	must be supported every 24” (610 mm) as shown in

UNCONDITIONED

SPACE

6" (152mm) Max

*WALL SUPPORT

OUTSIDE WALL

FIELD−PROVIDED

REDUCER MAY BE

REQUIRED TO

ADAPT LARGER

VENT PIPE SIZE TO

TERMINATION

1/2" (13mm) FOAM

INSULATION IN

UNCONDITIONED SPACE (IF REQUIRED)

12" (305mm) MAX. for 2" (51mm) 20" (508mm) MAX. for 3" (76mm)

SIZE TER-

MINATION

PIPE PER

TABLE 8.

12" (305mm)

ABOVE GRADE OR AVERAGE SNOW ACCUMULATION

1/2" (13mm) FOAM INSULATION (IF REQUIRED)

Figure 36. When exhaust piping must be run up an

outside wall, any reduction in exhaust pipe size must be

done after the final elbow.

NON−DIRECT VENT ROOF TERMINATION KIT

	(15F75 or 44J41)
	SIZE TERMINATION
12" (305mm)	PIPE PER TABLE 8.
ABOVE AVE.
SNOW
ACCUMULATION	1/2" (13mm) FOAM
	INSULATION IF REQUIRED

3" (76mm) OR

2" (51mm) PVCUNCONDITIONED

ATTIC SPACE

PROVIDE SUPPORT

FOR EXHAUST LINES

FIGURE 34

NON−DIRECT VENT FIELD SUPPLIED WALL TERMINATION
	12" (305mm) MAX. for 2" (51mm)
	20" (508mm) MAX. for 3" (76mm)
1/2" (13mm) ARMAFLEX
INSULATION IN
UNCONDITIONED SPACE (IF REQUIRED)	1/2" (13mm)
FIELD−PROVIDED	ARMAFLEX
	INSULATION
REDUCER MAY	(IF REQUIRED)
BE REQUIRED TO
ADAPT LARGER
VENT PIPE SIZE	PVC REDUCER
TO TERMINATION	12" MIN.
SIZE TERMINATION
	(305mm)
PIPE PER TABLE 8.	Above Grade or
	average snow
	accumulation

FIGURE 35

*Use wall support every 24" (610). Use two supports if extension is greater than 24" but less than 48".

FIGURE 36

NON−DIRECT VENT APPLICATION

USING EXISTING CHIMNEY

SIZE TERMINATION						STRAIGHT−CUT OR
PIPE PER TABLE 8.					ANGLE−CUT IN DIRECTION
						OF ROOF SLOPE
					EXHAUST VENT
					1/2" (13mm)
Minimum 12" (305MM)					WEATHERPROOF
				INSULATION (IF REQUIRED)
above chimney top
plate or average snow
			SHOULDER OF FITTINGS
accumulation				PROVIDE SUPPORT
			OF PIPE ON TOP PLATE
		SHEET
		METAL TOP
		PLATE
	INSULATE
	TO FORM					EXTERIOR
	SEAL					PORTION OF
						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 37

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