Lennox International Inc Elite Series Gas Furnace EL296UHE DIRECT VENT APPLICATION

EL296UHE DIRECT VENT APPLICATION

USING EXISTING CHIMNEY

						STRAIGHT-CUT OR
				3”-8”	ANGLE-CUT IN DIRECTION
						OF ROOF SLOPE *
			(76MM-203MM)
8” - 12”
						EXHAUST VENT
(203MM - 305MM)						1/2” (13MM)
						WEATHERPROOF
						INSULATION
Minimum 12” (305MM)
					SHOULDER OF FITTINGS
		INTAKE PIPE
above chimney top	INSULATION (optional)					PROVIDE SUPPORT
					OF PIPE ON TOP PLATE
plate or average snow		SHEET
							ALTERNATE
		METAL TOP
accumulation							INTAKE PIPE
		PLATE

	3” - 8”
	(76MM-
INSULATE	203MM)
		EXTERIOR
TO FORM
		PORTION OF
SEAL
		CHIMNEY

*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 46

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 47 through 50 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 48.

	SIZE TERMINATION
12” (305MM)	PIPE PER TABLE 8.
ABOVE AVE.
SNOW
ACCUMULATION	1/2” (13MM) FOAM
	INSULATION
3” (76MM) OR	UNCONDITIONED
2” (51MM) PVC
	ATTIC SPACE
PROVIDE SUPPORT
FOR EXHAUST LINES

NON-DIRECT VENT ROOF TERMINATION KIT

(15F75 or 44J41)

FIGURE 47

	12” (305MM) MAX. for 2” (51MM)
	20” (508MM) MAX. for 3” (76MM)
1/2” (13MM) ARMAFLEX
INSULATION IN
UNCONDITIONED SPACE	1/2” (13MM)
	ARMAFLEX
FIELD-PROVIDED	INSULATION
REDUCER MAY
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

NON-DIRECT VENT FIELD SUPPLIED WALL TERMINATION OR

(15F74) WALL TERMINATION KIT

FIGURE 48

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 49. When exhaust piping must be run up an outside wall, any reduction in exhaust pipe size must be done after the final elbow.

	12” (305MM) MAX. for 2” (51MM)
UNCONDITIONED	20” (508MM) MAX. for 3” (76MM)
SPACE
6” (152MM)
Max	SIZE TER­
	MINATION
*WALL SUPPORT	PIPE PER
OUTSIDE WALL	TABLE 8.
FIELD-PROVIDED	12” (305MM)
REDUCER MAY BE
	ABOVE GRADE OR
REQUIRED TO
	AVERAGE SNOW
ADAPT LARGER
	ACCUMULATION
VENT PIPE SIZE TO
TERMINATION

1/2” (13MM) FOAM
INSULATION IN
UNCONDITIONED	1/2” (13MM) FOAM
SPACE
	INSULATION

NON-DIRECT VENT FIELD SUPPLIED WALL TERMINATION EXTENDED OR (15F74) WALL TERMINATION VENT PIPE EXTENDED

*Use wall support every 24” (610). Use two supports if extension is

greater than 24” but less than 48”.

FIGURE 49

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