Lennox International Inc Elite Series Gas Furnace Alternate Terminations, 2” 51MM, 3” 76MM

7- If intake and exhaust piping must be run up a side wall to position above snow accumulation or other ob­ structions, piping must be supported every 24” (610MM) as shown in figures 36 and 37. In addition, close coupled wall termination kits must be extended for use in this application. See figures 44 and 45. When exhaust and intake piping must be run up an outside wall, the exhaust piping must be terminated with pipe sized per table 8.The intake piping may be equipped with a 90° elbow turndown. Using turndown will add 5 feet (1.5m) to the equivalent length of the pipe.

8 - A multiple furnace installation may use a group of up to four terminations assembled together horizontally, as

shown in figure 41.

B

D

C

2 A

Alternate Terminations
(Tee & Forty-Five Degree Elbows Only)
	B
			D
Intake		C	3
1
	A		Front View of
			Intake and Exhaust
		Exhaust
			Intake	Exhaust

			TABLE 9
D			2” (51MM)	3” (76MM)
	1		Vent Pipe	Vent Pipe
E		A- Clearance above
		grade or average snow	12” (305MM) Min.	12” (305MM) Min.
B		accumulation
		B-Horizontal
			6” (152MM) Min.	6” (152MM) Min.
		separation between
			24” (610MM) Max	24” (610MM) Max
		intake and exhaust
	12”
		C-Minimum from
C		end of exhaust to	9” (227MM) Min.	9” (227MM) Min.
		inlet of intake
2
A		D-Exhaust pipe length	12” (305MM) Min.	12” (305MM) Min.
			16” (405MM) Max.	20” (508MM) Max.
		E-Wall support distance
		from top of each pipe	6” (152MM) Max.	6” (152MM) Max.
		(intake/exhaust)

1The exhaust termination tee should be connected to the 2” or 3” PVC flue pipe as shown in the illustration. Do

not use an accelerator in applications that include an exhaust termination tee. The accelerator is not required.

2 As required. Flue gas may be acidic and may adversely affect some building materials. If a side wall vent termination is used and flue gases will impinge on the building materials, a corrosion-resistant shield (24 inches square) should be used to protect the wall surface. If optional tee is used, the protective shield is recommende­ d. The shield should be constructed using wood, sheet metal or other suitable material. All seams, joints, cracks, etc. in affected area, should be sealed using an appropriate sealant.

3Exhaust pipe 45° elbow can be rotated to the side away from the combustion air inlet to direct exhaust away from adjacent property. The exhaust must never be directed toward the combustion air inlet.

FIGURE 35

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