SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT
Model: SBN100-250
Input:250,000 Btu/hr. |
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| Total Vent Height (feet) |
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Vent Connector Size: 6” |
| 6 | 8 |
| 10 | 15 | 20 | 30 | 50 | 100 | |
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| Input Btu/hr | Rise | Vent Connector Diameter (inches) | ||||||||
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| 250,000 | 1' | 8 | 8 |
| 7 | 7 | 7 | 6 | 6 | 6 |
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| 250,000 | 2' | 7 | 7 |
| 7 | 7 | 6 | 6 | 6 | 6 |
| 250,000 | 3' | 7 | 7 |
| 7 | 7 | 6 | 6 | 6 | 6 |
No. of Units | Combined Input (Btu/hr x 1,000) | Combined Vent/Manifold Diameter | |||||||||
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2 | 500,000 |
| 9 | 9 |
| 9 | 8 | 8 | 7 | 7 | 7 |
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3 | 750,000 |
| 12 | 12 |
| 10 | 10 | 10 | 9 | 8 | 8 |
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4 | 1,000,000 |
| 14 | 14 |
| 12 | 12 | 10 | 10 | 9 | 9 |
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Model: SBN100-275
Input:275,000 Btu/hr. |
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Vent Connector Size: 6” |
| 6 | 8 |
| 10 | 15 | 20 | 30 | 50 | 100 | |
| Input Btu/hr | Rise | Vent Connector Diameter (inches) | ||||||||
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| 275,000 | 1' | 8 | 8 |
| 7 | 7 | 6 | 6 | 6 | 6 |
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| 275,000 | 2' | 8 | 8 |
| 7 | 7 | 6 | 6 | 6 | 6 |
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| 275,000 | 3' | 7 | 7 |
| 7 | 7 | 6 | 6 | 6 | 6 |
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No. of Units | Combined Input (Btu/hr x 1,000) | Combined Vent/Manifold Diameter | |||||||||
2 | 550,000 |
| 10 | 9 |
| 9 | 8 | 8 | 8 | 7 | 7 |
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3 | 825,000 |
| 12 | 12 |
| 12 | 10 | 9 | 9 | 8 | 8 |
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4 | 1,100,000 |
| 14 | 14 |
| 14 | 12 | 12 | 10 | 9 | 9 |
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State Water Heaters | 15 | Technical Training Department |
Ashland City, Tennessee © 2007 |
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