Common venting tables 5 – Lennox International Inc. G24-200 User Manual
Page 20
Page 20
TABLE 5
CAPACITY OF TYPE B DOUBLE-WALL VENTS WITH TYPE B DOUBLE-WALL CONNECTORS
SERVING TWO OR MORE CATEGORY I APPLIANCES
VENT CONNECTOR CAPACITY
Vent
Connector
Vent and Connector Diameter − D (inches)
Vent
Height
Connector
Rise
4 Inch
5 Inch
6 Inch
7 Inch
Height
H
(feet)
Rise
R
(feet)
Appliance Input Rating in Thousands of Btu Per Hour
(feet)
(feet)
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
1
35
66
46
106
58
164
77
225
6
2
37
75
48
121
60
183
79
253
6
3
38
81
49
132
62
199
82
275
1
35
72
49
114
64
176
84
243
8
2
36
80
51
128
66
195
86
269
3
37
87
53
139
67
210
88
290
1
34
78
49
123
65
189
89
257
10
2
36
86
51
136
67
206
91
282
3
37
92
52
146
69
220
94
303
1
33
89
47
142
64
220
88
298
15
2
35
96
49
153
66
235
91
320
3
36
102
51
163
68
248
93
339
1
33
99
46
157
62
246
86
334
20
2
34
105
48
167
64
259
89
354
3
35
110
50
176
66
271
91
371
1
31
113
45
181
60
288
83
391
30
2
33
118
47
190
62
299
85
408
3
34
123
48
198
64
309
88
423
TABLE 6
CAPACITY OF TYPE B DOUBLE-WALL VENTS WITH TYPE B DOUBLE-WALL CONNECTORS
SERVING TWO OR MORE CATEGORY I APPLIANCES
COMMON VENT CAPACITY
Vent
Common Vent Diameter − D (inches)
Vent
Height
4 Inch
5 Inch
6 Inch
7 Inch
Height
H
(feet)
Appliance Input Rating in Thousands of Btu Per Hour
(feet)
FAN + FAN
FAN + NAT
FAN + FAN
FAN + NAT
FAN + FAN
FAN + NAT
FAN + FAN
FAN + NAT
6
92
81
140
116
204
161
309
248
8
101
90
155
129
224
178
339
275
10
110
97
169
141
243
194
367
299
15
125
112
195
164
283
228
427
352
20
136
123
215
183
314
255
475
394
30
152
138
244
210
361
297
547
459