Lennox International Inc Elite Series Gas Furnace Standard Termination at Elevation 0 - 4500 ft

TABLE 5

Maximum Allowable Intake or Exhaust Vent Length in Feet

NOTE - Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size.

NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length calculation.

Standard Termination at Elevation 0 - 4500 ft

Number Of			2” Pipe					2-1/2” Pipe						3” Pipe
			Model						Model					Model
90° Elbows
Used
	045	070	090	110	135	045	070		090	110	135	045	070	090	110	135
1	81	66	44	24		115	115		93	58		138	137	118	118	114
2	76	61	39	19		110	110		88	53		133	132	113	113	109
3	71	56	34	14		105	105		83	48		128	127	108	108	104
4	66	51	29			100	100		78	43		123	122	103	103	99
5	61	46	24			95	95		73	38		118	117	98	98	94
					n/a						n/a
6	56	41	19			90	90		68	33		113	112	93	93	89
7	51	36	14	n/a		85	85		63	28		108	107	88	88	84
8	46	31				80	80		58	23		103	102	83	83	79
9	41	26	n/a			75	75		53	18		98	97	78	78	74
10	36	21				70	70		48	13		93	92	73	73	69
				Standard Termination Elevation 4500 - 10,000 ft
Number Of			2” Pipe					2-1/2” Pipe						3” Pipe
			Model						Model					Model
90° Elbows
Used
	045	070	090	110	135	045	070		090	110	135	045	070	090	110	135
1	81	66	44			115	115		93	58		138	137	118	118	114
2	76	61	39			110	110		88	53		133	132	113	113	109
3	71	56	34			105	105		83	48		128	127	108	108	104
4	66	51	29			100	100		78	43		123	122	103	103	99
5	61	46	24			95	95		73	38		118	117	98	98	94
				n/a	n/a						n/a
6	56	41	19			90	90		68	33		113	112	93	93	89
7	51	36	14			85	85		63	28		108	107	88	88	84
8	46	31				80	80		58	23		103	102	83	83	79
9	41	26	n/a			75	75		53	18		98	97	78	78	74
10	36	21				70	70		48	13		93	92	73	73	69

See concentric terminations next page.

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