9
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.
TABLE 6. TECHNICAL DATA VENTING
MODEL BTN-120
Input: 120,000 Btu/hr
Total Vent Height (Feet)
Vent Connector Size: 5 inches
6
8
10
15
20
30
50
100
Input Btu/hr
Rise
Vent Connector Diameter (Inches)
120,000
1 Ft.
6
6
5
5
5
5
5
5
120,000
2 Ft.
5
5
5
5
5
5
5
5
120,000
3 Ft.
5
5
5
5
5
5
5
5
Number of
Combined Input
BTN 120 Heaters
in Thousands of Btu/hr
Manifold and Common Vent Diameter (Inches)
2
240,000
7
7
6
6
6
6
6
6
3
360,000
8
8
7
7
7
6
6
6
4
480,000
9
9
9
8
8
7
7
6
MODEL BTN-154
Input: 154,000 Btu/hr
Total Vent Height (Feet)
Vent Connector Size: 6 inches
6
8
10
15
20
30
50
100
Input Btu/hr
Rise
Vent Connector Diameter (Inches)
154,000
1 Ft.
6
6
6
6
6
6
6
6
154,000
2 Ft.
6
6
6
6
6
6
6
6
154,000
3 Ft.
6
6
6
6
6
6
6
6
Number of
Combined Input
BTN 154 Heaters
in Thousands of Btu/hr
Manifold and Common Vent Diameter (Inches)
2
308,000
7
7
6
6
6
6
6
6
3
462,000
8
8
7
7
7
6
6
6
4
616,000
9
9
9
8
8
7
7
6
MODEL BTN-180,199, 200
Input: 180,000, 190,000 and 199,000 Btu/hr
Total Vent Height (Feet)
Vent Connector Size: 6 inches
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
BTN Heaters
in Thousands of Btu/hr
Manifold & Common Vent Diameter (Inches)
360,000
7
7
6
6
6
6
6
6
2
380,000
7
7
7
6
6
6
6
6
398,000
6
7
7
6
6
6
6
6
540,000
7
6
6
6
6
6
6
6
3
570,000
7
6
6
6
6
6
6
6
597,000
6
7
6
6
6
6
6
6
720,000
6
6
6
6
6
6
6
6
4
760,000
6
6
6
6
6
6
6
6
796,000
6
6
6
6
6
6
6
6
