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MODEL BTR(C)-120
Input: 120,00Btuh Total Vent Height (Feet)
Draft Hood: 5” 6 8 10 15 20 30 50 100
Input Btuh Rise Vent Connector Diameter (inches)
120,000 1 Ft. 7 7 7 6 6 6 6 6
120,000 2 Ft. 6 6 6 6 6 6 6 5
123,000 3 Ft. 6 6 6 6 6 5 5 5
Number Combined Input
of Heaters in Thousands of Btuh Manifold and Common Vent Diameter (In inches)
2 240 108877767
3 360 10 10 10 10 8 8 7 7
4 480 12 12 12 10 10 10 8 8
MODEL BTR(C)-154
Input: 154,000 Btuh Total Vent Height (Feet)
Draft Hood: 6” 6 8 10 15 20 30 50 100
Input Btuh Rise Vent Connector Diameter (in inches)
154,000 1 Ft. 8 8 7 7 7 7 7 7
154,000 2 Ft. 7 7 7 7 7 6 6 6
154,000 3 Ft. 7 7 7 6 6 6 6 6
Numbers Combined Input
of Heaters in Thousands of Btuh Manifold and Common Vent Diameter (in inches)
2 308 10 10 10 8 8 7 7 7
3 462 12 12 12 10 10 10 8 8
4 618 14 14 12 12 12 10 10 10
MODEL BTR(C)-180, 197, 198, 199, 200
Input: 180,000, 190,000, 199,000 Btuh Total Vent Height (Feet)
Draft Hood: 6” 6 8 10 15 20 30 50 100
Input Btuh Rise Vent Connector Diameter (in inches)
180,000 1 Ft. 8 8 8 8 8 7 7 7
190,000 - 8 8 8 8 8 7 7
199,000 - - 8 8 8 8 8 7
180,000 2 Ft. 8 8 7 7 7 7 7 7
190,000 8 8 8 7 7 7 7 7
199,000 8 8 8 8 7 7 7 7
179,000 3 Ft. 7 7 7 7 7 7 6 6
190,000 8 7 7 7 7 7 6 6
197,000 8 7 7 7 7 7 7 6
199,000 8 8 7 7 7 7 7 6
Number of Combined Input
Heaters in Thousands of Btuh Manifold & Common Vent Diameter
358 10 10 10 10 8 8 7 7
2 380 12 10 10 10 10 8 7 7
394/398 12 10 10 10 10 8 8 7
537 14 12 12 12 10 10 10 8
3 570 14 12 12 12 10 10 10 10
591/597 14 14 12 12 12 10 10 10
716 14 14 14 12 12 12 10 10
4 760 16 14 14 14 12 12 10 10
788/796 16 14 14 14 12 12 12 10
TYPE B GAS VENT
Multiple Gas Fired Tank-Type Heaters
When venting mutiple tank type heaters using Type B
vent pipe, follow the installation diagram (figure 8) and
tables below which give sizing and data based upon
NFPA 54/ANSI Z223.
TECHNICAL DATA VENTING, TABLE 3
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