SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TYPE B GAS VENT
Multiple Gas Fired Tank-Type Heaters
When venting multiple tank type heaters using Type B vent pipe, follow the installation diagram (figure 4) and tables below which give sizing and data based upon NFPA 54/ANSI Z223. 1992.
MODEL SBN |
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Input: 120,000 Btu/hr |
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| Total Vent Height (Feet) |
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Vent Connector Size: 5 inches |
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| 6 | 8 | 10 | 15 | 20 | 30 |
| 50 | 100 | ||||
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| Input Btu/hr |
| Rise |
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| Vent Connector Diameter (Inches) | |||||||
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| 120,000 |
| 1 Ft. |
| 6 | 6 | 5 | 5 | 5 | 5 |
| 5 | 5 | |
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| 120,000 |
| 2 Ft. |
| 5 | 5 | 5 | 5 | 5 | 5 |
| 5 | 5 | |
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| 120,000 |
| 3 Ft. |
| 5 | 5 | 5 | 5 | 5 | 5 |
| 5 | 5 | |
Number of |
| Combined Input |
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Heaters |
| in Thousands of Btu/hr | Manifold and Common Vent Diameter (Inches) | ||||||||||||
2 |
| 240,000 |
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| 7 | 7 | 6 | 6 | 6 | 6 |
| 6 | 6 | |
3 |
| 360,000 |
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| 8 | 8 | 7 | 7 | 7 | 6 |
| 6 | 6 | |
4 |
| 480,000 |
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| 9 | 9 | 9 | 8 | 8 | 7 |
| 7 | 6 | |
MODEL SBN |
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Input: 154,000 Btu/hr |
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| Total Vent Height (Feet) |
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Vent Connector Size: | 6 inches |
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| 6 | 8 | 10 | 15 | 20 | 30 |
| 50 | 100 | |||
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| Input Btu/hr |
| Rise |
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| Vent Connector Diameter (Inches) | |||||||
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| 154,000 |
| 1 Ft. |
| 6 | 6 | 6 | 6 | 6 | 6 |
| 6 | 6 |
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| 154,000 |
| 2 Ft. |
| 6 | 6 | 6 | 6 | 6 | 6 |
| 6 | 6 |
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| 154,000 |
| 3 Ft. |
| 6 | 6 | 6 | 6 | 6 | 6 |
| 6 | 6 | |
Number of |
| Combined Input |
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Heaters |
| in Thousands of Btu/hr | Manifold and Common Vent Diameter (Inches) | ||||||||||||
2 |
| 308,000 |
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| 7 | 7 | 6 | 6 | 6 | 6 |
| 6 | 6 | |
3 |
| 462,000 |
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| 8 | 8 | 7 | 7 | 7 | 6 |
| 6 | 6 | |
4 |
| 616,000 |
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| 9 | 9 | 9 | 8 | 8 | 7 |
| 7 | 6 | |
MODEL SBN |
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Input: 180,000, 190,000 and 199,000 Btu/hr |
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| Total Vent Height (Feet) |
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Vent Connector Size: 6 inches |
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| 6 | 8 | 10 | 15 | 20 | 30 |
| 50 | 100 | ||||
| Input Btuh/hr | Rise | Vent Connector Diameter (Inches) | ||||||||
| 180,000 |
| 1 Ft. | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 |
| 190,000 |
| 1 Ft. | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 |
| 199,000 |
| 1 Ft. | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 |
| 180,000 |
| 2 Ft. | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 190,000 |
| 2 Ft. | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 199,000 |
| 2 Ft. | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 |
| 180,000 |
| 3 Ft. | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 190,000 |
| 3 Ft. | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 199,000 |
| 3 Ft. | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
Number of | Combined Input |
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Heaters | in Thousands of Btu/hr |
| Manifold & Common Vent Diameter (Inches) | ||||||||
| 360,000 |
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| 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 |
2 | 380,000 |
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| 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 |
| 398,000 |
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| 6 | 7 | 7 | 6 | 6 | 6 | 6 | 6 |
| 540,000 |
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| 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
3 | 570,000 |
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| 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 597,000 |
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| 6 | 7 | 6 | 6 | 6 | 6 | 6 | 6 |
| 720,000 |
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| 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
4 | 760,000 |
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| 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 796,000 |
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| 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
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©2003 |
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| 16 |
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| Technical Training Department | ||||
Ashland City, Tennessee
