Table of Contents
Advertisement
21. When connecting this appliance to an existing dedicated or common venting system, you must inspect the venting
system's general condition and look for signs of corrosion. The existing vent pipe size must conform to these instructions
and the provided venting tables. If the existing venting system does not meet these requirements, it must be resized.
Capacity of Type B Double Wall Vents with Type B Double Wall Connectors Serving a Single Category I Appliance
Height
Lateral
H
L
(feet)
(feet)
0
2
6
4
6
0
2
8
5
8
0
2
10
5
10
0
2
15
5
10
15
0
2
5
20
10
15
20
0
2
5
30
10
15
20
30
NOTE: Single appliance venting configurations with zero lateral lengths are assumed to have no elbows in the vent system. For
all other vent configurations, the vent system is assumed to have two 90 ° elbows. For each additional 90° elbow or equivalent (for
example two 45° elbows equal one 90° elbow) beyond two, the maximum capacity listed in the venting table should be reduced by 10
percent (0.90 x maximum listed capacity).
508145-01G / 31-5000660
3 inch
Appliance Input Rating in Thousands of Btu per Hour
MIN
MAX
0
78
13
51
21
49
25
46
0
84
12
57
23
53
28
49
0
88
12
61
23
57
30
51
0
94
11
69
22
65
29
59
35
53
0
97
10
75
21
71
28
64
34
58
48
52
0
100
9
81
21
77
27
70
33
64
56
58
NA
NA
Vent and Connector Diameter - D (inches)
4 inch
MIN
MAX
0
152
18
97
30
94
36
91
0
165
16
109
32
103
39
98
0
175
17
118
32
113
41
104
0
191
15
136
30
130
40
121
48
112
0
202
14
149
29
143
38
133
46
124
55
116
0
213
13
166
28
160
37
150
44
141
53
132
73
113
Table 5.
Issue 2220
5 inch
MIN
MAX
0
251
27
157
39
153
47
149
0
276
25
178
42
171
51
164
0
295
23
194
41
187
54
176
0
327
20
226
39
219
51
206
61
195
0
349
18
250
38
242
50
229
59
217
69
206
0
374
14
283
36
275
48
262
57
249
66
237
88
214
6 inch
MIN
MAX
0
375
32
232
50
227
59
223
0
415
28
263
53
255
64
247
0
447
26
289
52
280
67
267
0
502
22
339
49
330
64
315
76
301
0
540
20
377
47
367
62
351
73
337
84
322
0
587
18
432
45
421
59
405
70
389
80
374
104
346
Page 15 of 38
Advertisement
Table of Contents
