Lennox Allied Air A80DF Installation Instructions Manual page 18

Vent Connector
Height H Rise R
(feet) (feet)
1
6 2
3
1
8 2
3
1
10 2
3
1
2
15
3
1
20 2
3
1
30 2
3
Vent Height
H (feet)
FAN + FAN
6 92
8 101
10 110
15 125
20 136
30 152
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Vent Connector Capacity
Type B Double Wall Vents with Type B Double Wall Connectors
Serving Two or More Category I Appliances
3 inch
Appliance Input Rating in Thousands of Btu per Hour
MIN MAX
22 37
23 41
24 44
22 40
23 44
24 47
22 43
23 47
24 50
21 50
22 53
24 55
21 54
22 57
23 60
20 62
21 64
22 66
Type B Double Wall Vents with Type B Double Wall Connectors
Serving Two or More Category I Appliances
4 inch
Appliance Input Rating in Thousands of Btu per Hour
FAN + NAT FAN + FAN
81 140
90 155
97 169
112 195
123 215
138 244
Vent and Connector Diameter - D (inches)
4 inch
MIN MAX
35 66
37 75
38 81
35 72
36 80
37 87
34 78
36 86
37 92
33 89
35 96
36 102
33 99
34 105
35 110
31 113
33 118
34 123
Table 6
Common Vent Capacity
Common Vent Diameter
5 inch
FAN + NAT FAN + FAN
116
129
141
164
183
210
Table 7
Issue 1809
5 inch
MIN MAX
46 106
48 121
49 132
49 114
51 128
53 139
49 123
51 136
52 146
47 142
49 153
51 163
46 157
48 167
50 176
45 181
47 190
48 198
6 inch
FAN + NAT FAN + FAN
204 161
224 178
243 194
283 228
314 255
361 297
6 inch
MIN MAX
58 164
60 183
62 199
64 176
66 195
67 210
65 189
67 206
69 220
64 220
66 235
68 248
62 246
64 259
66 271
60 288
62 299
64 309
7 inch
FAN + NAT
309 248
339 275
367 299
427 352
475 394
547 459
507327-01