Bryant 340AAV - Manual (Page 8)

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COMBUSTION-AIR AND VENT PIPING Direct-Vent/2-Pipe (All Sizes) and
Non-Direct Vent/1-Pipe (Sizes 040 Through 120 Only) Applications
MAXIMUM ALLOWABLE PIPE LENGTH (FT)
ALTITUDE (FT)
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.)*
1 2 3 4 5 6
0 to 2000
40,000
2 Pipe or 2-in
Concentric
1 1 5 NA NA NA NA NA
1-1/2 1-1/2 70 70 65 60 60 55
2 2 70 70 70 70 70 70
60,000
2 Pipe or 2-in
Concentric
1-1/2 1-1/2 20 15 10 5 NA NA
2 2 70 70 70 70 70 70
80,000
2 Pipe or 2-in
Concentric
1-1/2 1-1/2 10 NA NA NA NA NA
2 2 55 50 35 30 30 20
2-1/2 2-1/2 70 70 70 70 70 70
100,000
2 Pipe or 3-in
Concentric
2 2 5 NA NA NA NA NA
2-1/2 2-1/2 40 30 20 20 10 NA
3 3 70 70 70 70 70 70
120,000
2 Pipe or 3-in.
Concentric
2-1/2 one disk 2-1/2 10 NA NA NA NA NA
3† NA 45 40 35 30 25 20
3† no disk 3† 70 70 70 70 70 70
140,000
2 Pipe or 3-in.
Concentric
2-1/2 one disk NA 5 NA NA NA NA NA
3† one disk NA 40 35 30 25 20 15
3† no disk NA 60 56 52 48 44 40
4† no disk NA 70 70 70 70 70 70
ALTITUDE (FT)
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.)*
1 2 3 4 5 6
2001 to 3000
40,000
2 Pipe or 2-in
Concentric
1-1/2 1-1/2 67 62 57 52 52 47
2 2 70 70 70 70 70 70
60,000
2 Pipe or 2-in
Concentric
1-1/2 1-1/2 17 12 7 NA NA NA
2 2 70 67 66 61 61 61
80,000
2 Pipe or 2-in
Concentric
2 2 49 44 30 25 25 15
2-1/2 2-1/2 70 70 70 70 70 70
100,000
2 Pipe or 3-in
Concentric
2-1/2 2-1/2 35 26 16 16 6 NA
3 3 70 70 70 70 66 61
120,000
2 Pipe or 3-in.
Concentric
3 NA 14 9 NA NA NA NA
NA 3† 63 62 62 61 61 61
3† no disk NA 70 70 63 56 50 43
4† no disk 4† no disk 70 70 70 70 70 70
140,000
2 Pipe or 3-in.
Concentric
3† one disk NA 20 15 10 5 NA NA
3† no disk NA 39 35 31 27 23 19
4† no disk NA 70 70 70 70 70 70
ALTITUDE (FT)
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.)*
1 2 3 4 5 6
3001 to 4000
40,000
2 Pipe or 2-in
Concentric
1-1/2 1-1/2 64 59 54 49 48 43
2 2 70 70 70 70 70 70
60,000
2 Pipe or 2-in
Concentric
1-1/2 1-1/2 16 11 6 NA NA NA
2 2 68 63 62 57 57 56
80,000
2 Pipe or 2-in
Concentric
2 2 46 41 28 23 22 13
2-1/2 2-1/2 70 70 70 70 70 70
100,000
2 Pipe or 3-in
Concentric
2-1/2 2-1/2 33 24 15 14 5 NA
3 3 70 70 70 66 61 56
120,000
2 Pipe or 3-in.
Concentric
3† no disk NA 65 58 51 44 38 31
NA 3† 59 59 58 57 57 56
4† no disk 4† no disk 4† no disk 70 70 70 70 70 70
140,000
2 Pipe or 3-in.
Concentric
3† one disk NA 11 6 NA NA NA NA
3† no disk NA 30 26 22 18 14 10
4† no disk NA 70 70 70 70 70 70
See notes at end of table