Combustion-Air And Vent Piping; Maximum Allowable Pipe Length (Ft) - Bryant 340AAV Product Data

COMBUSTION-AIR AND VENT PIPING Direct-Vent/2-Pipe (All Sizes) and
Non-Direct Vent/1-Pipe (Sizes 040 Through 120 Only) Applications
UNIT SIZE
ALTITUDE (FT)
(BTUH)
40,000
60,000
80,000
0 to 2000
100,000
120,000
140,000
UNIT SIZE
ALTITUDE (FT)
(BTUH)
40,000
60,000
80,000
100,000
2001 to 3000
120,000
140,000
UNIT SIZE
ALTITUDE (FT)
(BTUH)
40,000
60,000
80,000
3001 to 4000
100,000
120,000
140,000
See notes at end of table

MAXIMUM ALLOWABLE PIPE LENGTH (FT)

DIRECT VENT (2-PIPE) ONLY
TERMINATION PIPE DIA
TYPE (IN.)*
1
2 Pipe or 2-in
1-1/2
Concentric
2
1-1/2
2 Pipe or 2-in
Concentric
2
1-1/2
2 Pipe or 2-in
2
Concentric
2-1/2
2
2 Pipe or 3-in
2-1/2
Concentric
3
2-1/2 one disk
2 Pipe or 3-in.
3†
Concentric
3† no disk
2-1/2 one disk
3† one disk
2 Pipe or 3-in.
Concentric
3† no disk
4† no disk
DIRECT VENT (2-PIPE) ONLY
TERMINATION PIPE DIA
TYPE (IN.)*
1-1/2
2 Pipe or 2-in
Concentric
2
1-1/2
2 Pipe or 2-in
Concentric
2
2
2 Pipe or 2-in
Concentric
2-1/2
2-1/2
2 Pipe or 3-in
Concentric
3
3
NA
2 Pipe or 3-in.
Concentric
3† no disk
4† no disk
3† one disk
2 Pipe or 3-in.
3† no disk
Concentric
4† no disk
DIRECT VENT (2-PIPE) ONLY
TERMINATION PIPE DIA
TYPE (IN)*
1-1/2
2 Pipe or 2-in
Concentric
2
1-1/2
2 Pipe or 2-in
Concentric
2
2
2 Pipe or 2-in
Concentric
2-1/2
2-1/2
2 Pipe or 3-in
Concentric
3
3† no disk
2 Pipe or 3-in.
Concentric
NA
4† no disk 4† no disk
3† one disk
2 Pipe or 3-in.
3† no disk
Concentric
4† no disk
—8—
NON-DIRECT VENT
(1-PIPE) ONLY
PIPE DIA
1
(IN.)*
1 5
1-1/2 70
2 70
1-1/2 20
2 70
1-1/2 10
2 55
2-1/2 70
2 5
2-1/2 40
3 70
2-1/2 10
NA 45
3† 70
NA 5
NA 40
NA 60
NA 70
NON-DIRECT VENT
(1-PIPE) ONLY
PIPE DIA
1
(IN.)*
1-1/2 67
2 70
1-1/2 17
2 70
2 49
2-1/2 70
2-1/2 35
3 70
NA 14
3† 63
NA 70
4† no disk 70
NA 20
NA 39
NA 70
NON-DIRECT VENT
(1-PIPE) ONLY
PIPE DIA
1
(IN.)*
1-1/2 64
2 70
1-1/2 16
2 68
2 46
2-1/2 70
2-1/2 33
3 70
NA 65
3† 59
4† no disk 70
NA 11
NA 30
NA 70
NUMBER OF 90° ELBOWS
2 3 4 5
NA NA NA NA
70 65 60 60
70 70 70 70
15 10 5 NA
70 70 70 70
NA NA NA NA
50 35 30 30
70 70 70 70
NA NA NA NA
30 20 20 10
70 70 70 70
NA NA NA NA
40 35 30 25
70 70 70 70
NA NA NA NA
35 30 25 20
56 52 48 44
70 70 70 70
NUMBER OF 90° ELBOWS
2 3 4 5
62 57 52 52
70 70 70 70
12 7 NA NA
67 66 61 61
44 30 25 25
70 70 70 70
26 16 16 6
70 70 70 66
9 NA NA NA
62 62 61 61
70 63 56 50
70 70 70 70
15 10 5 NA
35 31 27 23
70 70 70 70
NUMBER OF 90° ELBOWS
2 3 4 5
59 54 49 48
70 70 70 70
11 6 NA NA
63 62 57 57
41 28 23 22
70 70 70 70
24 15 14 5
70 70 66 61
58 51 44 38
59 58 57 57
70 70 70 70
6 NA NA NA
26 22 18 14
70 70 70 70
6
NA
55
70
NA
70
NA
20
70
NA
NA
70
NA
20
70
NA
15
40
70
6
47
70
NA
61
15
70
NA
61
NA
61
43
70
NA
19
70
6
43
70
NA
56
13
70
NA
56
31
56
70
NA
10
70