Carrier 58MXA Product Data page 16

MAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH (FT) WITH AND WITHOUT INSULATION
WINTER DESIGN
UNIT TEMPERATURE
SIZE
040-08
040-12
060-08
060-12
060-16
080-12
080-16
080-20
100-16
100-20
120-20
140-20
* Pipe length (ft) specified for maximum vent pipe lengths located in unconditioned spaces. Vent pipes located in unconditioned space cannot
exceed the total allowable pipe length as specified in Maximum Allowable Pipe Length table.
† Insulation thickness based on R value of 3.5 per in.
16
IN WINTER DESIGN TEMPERATURE AMBIENT*
MAX PIPE
DIAMETER
(°F)
20 1-1/2
0 1-1/2
–20 1-1/2
20
0
–20
20 2-1/2
0 2-1/2
–20 2-1/2
20
0
–20
20
0
–20
20
0
–20
WITHOUT
(IN.) INSULATION
2
2
2
3
3
3
4
4
4
4
4
4
WITH 3/8-IN. OR
THICKER INSULATION†
51
28
16
65
35
20
70
47
28
70
50
28
70
48
23
70
57
30
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70
70