19
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 13) and tables
below which give sizing and data based upon NFPA 54/ANSI
Z223. 2006.
TABLE 6. TECHNICAL DATA VENTING
Model BCL380T1206NOX
Input: 120,000 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)
120,000
1 ft.
6
6
5
5
5
5
5
5
120,000
2ft.
5
5
5
5
5
5
5
5
120,000
3ft.
5
5
5
5
5
5
5
5
Number of 120 Heaters
Combined Input 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 BCL380T1546NOX
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
2ft.
6
6
6
6
6
6
6
6
154,000
3ft.
6
6
6
6
6
6
6
6
Number of 154 Heaters
Combined Input 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 BCL380T1806NOX - 100T1996NOX
Input: 180,000 and 199,000 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)
180,000
1 ft.
7
7
6
6
6
6
6
6
199,000
1 ft.
7
7
7
6
6
6
6
6
180,000
2ft.
6
6
6
6
6
6
6
6
199,000
2ft.
7
7
6
6
6
6
6
6
180,000
3ft.
6
6
6
6
6
6
6
6
199,000
3ft.
6
6
6
6
6
6
6
6
Number of Heaters
Combined Input in
Thousands of Btu/hr
Manifold and Common Vent Diameter (Inches)
2
360,000
8
8
8
7
7
7
6
6
398,000
8
8
8
7
7
7
6
6
3
540,000
10
9
9
9
8
8
7
7
597,000
10
9
9
9
8
8
7
7
4
720,000
12
12
10
10
9
9
8
8
796,000
12
12
10
10
9
9
8
8
Model BCL3100T2506NOX
Input: 250,000 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)
250,000
1 ft.
8
8
7
7
7
6
6
6
250,000
2ft.
7
7
7
7
6
6
6
6
250,000
3ft.
7
7
7
7
6
6
6
6
Number of 250 Heaters
Combined Input in
Thousands of Btu/hr
Manifold and Common Vent Diameter (Inches)
2
500,000
9
9
9
8
8
7
7
7
3
750,000
12
12
10
10
10
9
8
8
4
1,000,000
14
14
12
12
10
10
9
9
Summary of Contents for (A)BCL3100T2506NOX
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