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TYPE B GAS VENT
Multiple Gas Fired Tank-Type Heaters
When venting multiple tank type heaters using Type B vent
TABLE 7. TECHNICAL DATA VENTING
MODEL N71120NE
Input: 120,000 Btu/hr Total Vent Height (Feet)
Vent Connector Size: 5 inches
8 10 15 20 30 50 100
Input Btu/hr
Rise
Vent Connector Diameter (Inches)
5 5 5 5 5 5
5 5 5 5 5 5 5 5
5 5 5 5 5 5 5 5
Number of
Heaters
Combined Input
in Thousands of Btu/hr Manifold and Common Vent Diameter (Inches)
2
7 7
3
8 8 7 7 7
9 9 9 8 8 7 7
MODEL N81154NE
Input: 154,000 Btu/hr Total Vent Height (Feet)
Vent Connector Size: 6 inches
8 10 15 20 30 50 100
Input Btu/hr
Rise Vent Connector Diameter (Inches)
Number of
Heaters
Combined Input
in Thousands of Btu/hr Manifold and Common Vent Diameter (Inches)
2
7 7
3
8 8 7 7 7
9 9 9 8 8 7 7
MODEL N100-180, 199, 200
Input: 180,000 and 199,000 Btu/hr Total Vent Height (Feet)
Vent Connector Size: 6 inches
8 10 15 20 30 50 100
Input Btuh/hrRise
Vent Connector Diameter (Inches)
7 7
7 7 7
7 7
Number of
Heaters
Combined Input
in Thousands of Btu/hr Manifold and Common Vent Diameter (Inches)
2
7 7
7 7 7
3
7
7 7