Lennox International Inc 070V36B, 090V36C, 110V60C Concentric Termination at Elevation 0 − 4500’

TABLE 7

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’

Number Of

90° Elbows

Used

	2" Pipe			2−1/2" Pipe			3" Pipe
	Model			Model			Model
070	090	110	070	090	110	070	090	110

1	83	67	12	130	89	39	146	139	114
2	78	62	7	125	84	34	141	134	109
3	73	57		120	79	29	136	129	104
4	68	52		115	74	24	131	124	99
5	63	47		110	69	19	126	119	94
6	58	42	n/a	105	64	14	121	114	89
7	53	37		100	59		116	109	84
8	48	32		95	54	n/a	111	104	79
9	43	27		90	49		106	99	74
10	38	22		85	44		101	94	69
			Concentric Termination Elevation 4501’ − 7500’
Number Of		2" Pipe			2−1/2" Pipe			3" Pipe
90° Elbows		Model			Model			Model
Used
	070	090	110	070	090	110	070	090	110
1	58	67	12	105	89	39	121	114	114
2	53	62	7	100	84	34	116	109	109
3	48	57		95	79	29	111	104	104
4	43	52		90	74	24	106	99	99
5	38	47		85	69	19	101	94	94
6	33	42	n/a	80	64	14	96	89	89
7	28	37		75	59		91	84	84
8	23	32		70	54	n/a	86	79	79
9	18	27		65	49		81	74	74
10	13	22		60	44		76	69	69
			Concentric Terminatioin at Elevation 7501’ − 10,000’’
Number Of		2" Pipe			2−1/2" Pipe			3" Pipe
90° Elbows
		Model			Model			Model
Used
	070	090	110	070	090	110	070	090	110
1	33	42		80	64		96	114	89
2	28	37		75	59		91	109	84
3	23	32		70	54		86	104	79
4	18	27		65	49		81	99	74
5	13	22		60	44		76	94	69
			n/a			n/a
6		17		55	39		71	89	64
7		12		50	34		66	84	59
8	n/a			45	29		61	79	54
9		n/a		40	24		56	74	49
10				35	19		51	69	44

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