Bryant 4-WAY MULTIPOISE TWO-STAGE CONDENSING GAS FURNACE 352AAV User Manual
Page 9
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352AAV
MAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH (FT) WITH AND WITHOUT INSULATION
IN WINTER DESIGN TEMPERATURE AMBIENT
*
* Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces. Pipes located in unconditioned space cannot exceed total
allowable pipe length as specified in Table 6.
† Insulation thickness based on R value of 3.5 per inch.
UNIT SIZE
WINTER DESIGN
TEMPERATURE
(°F)
MAX PIPE
DIAMETER
(IN.)
WITHOUT
INSULATION
WITH 3/8-IN. OR
THICKER INSULATION†
060
20
2
44
70
0
2
21
70
–20
2
20
57
080
20
2
55
55
0
2
30
55
–20
2
16
55
20
2.5
58
70
0
2.5
29
70
–20
2.5
14
67
100
20
2.5
40
40
0
2.5
38
40
–20
2.5
21
40
20
3
63
70
0
3
30
70
–20
3
12
70
120
20
3
70
70
0
3
38
70
–20
3
19
70
20
4
65
70
0
4
26
70
–20
4
5
65
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