Carrier 58MVB - Page 35

Table 11—Maximum Allowable Pipe Length (Ft)
ALTITUDE
UNIT SIZE
(BTUH)
DIRECT VENT (2-PIPE) ONLY
NON-DIRECT VENT
(1-PIPE) ONLY
NUMBER OF 90° ELBOWS
Termination
Type
Pipe Dia
(IN.)*
Pipe Dia
(IN.)*
123456
0 to 2000
40,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 50 45 40 35 30 25
2 2 70 70 70 70 70 70
60,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 50 45 40 35 30 25
2 2 70 70 70 70 70 70
80,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 30 25 20 15 10 5
2 2 70 70 70 70 70 70
100,000
2 Pipe or 2-In.
Concentric
2 2 45 40 35 30 25 20
2-1/2 2-1/2 70 70 70 70 70 70
120,000
2 Pipe or 3-In.
Concentric
2-1/2 2-1/2 10 NA NA NA NA NA
3 3 35 30 15 NA NA NA
3† 3 707070707070
ALTITUDE
UNIT SIZE
(BTUH)
DIRECT VENT (2-PIPE) ONLY
NON-DIRECT VENT
(1-PIPE) ONLY
NUMBER OF 90° ELBOWS
Termination
Type
Pipe Dia
(IN.)*
Pipe Dia
(IN.)*
123456
2001 to 3000
40,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 45 40 35 30 25 20
2 2 70 70 70 70 70 70
60,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 45 40 35 30 25 20
2 2 70 70 70 70 70 70
80,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 26 21 16 11 6 NA
2 2 70 70 70 70 70 70
100,000
2 Pipe or 2-In.
Concentric
2 2 40 35 30 25 20 15
2-1/2 2-1/2 70 70 70 70 70 70
120,000
2 Pipe or 3-In.
Concentric
3 3 31 26 12 NA NA NA
3† 3 636262616161
ALTITUDE
UNIT SIZE
(BTUH)
DIRECT VENT (2-PIPE) ONLY
NON-DIRECT VENT
(1-PIPE) ONLY
NUMBER OF 90° ELBOWS
Termination
Type
Pipe Dia
(IN.)*
Pipe Dia
(IN.)*
123456
3001 to 4000
40,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 42 37 32 27 22 17
2 70 7070707070
60,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 42 37 32 27 22 17
2 2 70 70 70 70 70 70
80,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 25 20 15 10 5 NA
2 2 70 70 70 70 70 70
100,000
2 Pipe or 2-In.
Concentric
2 2 38 33 28 23 18 13
2-1/2 2-1/2 70 70 70 70 70 70
120,000
2 Pipe or 3-In.
Concentric
3 3 29 24 10 NA NA NA
3† 3 595958575756
ALTITUDE
UNIT SIZE
(BTUH)
DIRECT VENT (2-PIPE) ONLY
NON-DIRECT VENT
(1-PIPE) ONLY
NUMBER OF 90° ELBOWS
Termination
Type
Pipe Dia
(IN.)*
Pipe Dia
(IN.)*
123456
4001 to 5000‡
40,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 40 35 30 25 20 15
2 2 70 70 70 70 70 70
60,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 40 35 30 25 20 15
2 2 70 70 70 70 70 70
80,000
2 Pipe or 2-In.
Concentric
1-1/2 1-1/2 23 18 13 8 NA NA
2 2 70 70 70 70 70 68
100,000
2 Pipe or 2-In.
Concentric
2 2 36 31 26 21 16 11
2-1/2 2-1/2 70 70 70 70 70 70
120,000
2 Pipe or 3-In.
Concentric
3† 3 565554535252
See notes on next page.
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