Carrier Condensing gas furnace Operations Instructions download pdf (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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