COMMERCIAL MODELS
1321 Series ASME
Model: N-1321M-ASME
Maximum Allowable Vent Lengths for N-1321M-ASME
| Pipe Diameter - 5" |
|
No. of Elbows
|
Max. Straight Vent Length (ft) |
| 3 |
15 |
| 2 |
30 |
| 1 |
45 |
0931 Series ASME
Model: N-0931M-ASME
Maximum Allowable Vent Lengths for N-0931M-ASME
| Pipe Diameter - 4" |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
15 |
| 2 |
27 |
| 1 |
39 |
Model: N-0931M-DV-ASME
Maximum Allowable Vent Lengths for N-0931M-DV-ASME
| Pipe Diameter - 4" |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
45 |
| 2 |
51 |
| 1 |
57 |
RESIDENTIAL MODELS
0931 Series
Model: N-0931M
Maximum Allowable Vent Lengths for N-0931M
| Pipe Diameter - 4" |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
15 |
| 2 |
27 |
| 1 |
39 |
Model: N-0931M-DV
Maximum Allowable Vent Lengths for N-0931M-DV
| Pipe Diameter - 4" |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
45 |
| 2 |
51 |
| 1 |
57 |
Model: N-0931M-OD
0841 Series
Model: N-0841MC
Maximum Allowable Vent Lengths
| Pipe Diameter - 3" or 4" |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
3" - 3 4" - 15 |
| 2 |
3" - 10 4" - 27 |
| 1 |
3" - 17 4" - 39 |
Model: N-0841MC-DV
Maximum Allowable Vent Lengths
| Pipe Diameter - 3" or 4" |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
3" - 10 4" - 45 |
| 2 |
3" - 13 4" - 51 |
| 1 |
3" - 16 4" - 57 |
0751 Series
Model: N-0751M
Maximum Allowable Vent Lengths for N-0751M
| Pipe Diameter - 4" |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
15 |
| 2 |
27 |
| 1 |
39 |
Model: N-0751M-DV
Maximum Allowable Vent Lengths for N-0751M-DV
| Pipe Diameter - 4" |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
45 |
| 2 |
51 |
| 1 |
57 |
Model: N-0751M-OD
Model: N-0751M-DVC
Maximum Allowable Vent Lengths for N-0751M-DVC
| Pipe Diameter - 3"/5" Concentric |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
23 |
| 2 |
29 |
| 1 |
35 |
0631 Series
Model: N-0631S
Maximum Allowable Vent Lengths for N-0631S
| Pipe Diameter - 4" |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
15 |
| 2 |
27 |
| 1 |
39 |
Model: N-0631S-OD
0531 Series
Model: N-0531S
Maximum Allowable Vent Lengths for N-0531S
| Pipe Diameter - 3" |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
15 |
| 2 |
25 |
| 1 |
35 |
Model: N-0531S-OD
NH Series
Models: NH-1501-DV, NH-2001-DV
Maximum Allowable Vent Lengths for NH Series
| Pipe Diameter - 4" |
| No. of Elbows |
Max. Straight Vent Length (ft) |
| 3 |
45 |
| 2 |
51 |
| 1 |
57 |
