Lennox International Inc EL296UHE Maximum Allowable Intake or Exhaust Vent Length in Feet

TABLE 5 Continued

Maximum Allowable Intake or Exhaust Vent Length in Feet

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.

Concentric Termination at Elevation 0 - 4500 ft

Number Of			2” Pipe					2-1/2” Pipe						3” Pipe
90° Elbows
			Model						Model					Model
Used
	045	070	090	110	135	045	070		090	110	135	045	070	090	110	135
1	73	58	42	22		105	105		89	54		121	121	114	114	105
2	68	53	37	17		100	100		84	49		116	116	109	109	100
3	63	48	32	12		95	95		79	44		111	111	104	104	95
4	58	43	27			90	90		74	39		106	106	99	99	90
5	53	38	22			85	85		69	34		101	101	94	94	85
					n/a						n/a
6	48	33	17			80	80		64	29		96	96	89	89	80
7	43	28	12	n/a		75	75		59	24		91	91	84	84	75
8	38	23				70	70		54	19		86	86	79	79	70
9	33	18	n/a			65	65		49	14		81	81	74	74	65
10	28	13				60	60		44	n/a		76	76	69	69	60
			Concentric Termination Elevation 4501 - 10,000 ft
Number Of			2” Pipe					2-1/2” Pipe						3” Pipe
90° Elbows
			Model						Model					Model
Used
	045	070	090	110	135	045	070		090	110	135	045	070	090	110	135
1	73	58	42			105	105		89	54		121	121	114	114	105
2	68	53	37			100	100		84	49		116	116	109	109	100
3	63	48	32			95	95		79	44		111	111	104	104	95
4	58	43	27			90	90		74	39		106	106	99	99	90
5	53	38	22			85	85		69	34		101	101	94	94	85
				n/a	n/a						n/a
6	48	33	17			80	80		64	29		96	96	89	89	80
7	43	28	12			75	75		59	24		91	91	84	84	75
8	38	23				70	70		54	19		86	86	79	79	70
9	33	18	n/a			65	65		49	14		81	81	74	74	65
10	28	13				60	60		44	n/a		76	76	69	69	60

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