14
Servicing should only be performed by a Qualified Service Technician
VENTING TABLES
–
TECHNICAL VENTING DATA
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 and tables below which give sizing
and data based upon NFPA 54 ANSI Z223.1.
MODEL SBL85275NE(A) Input: 275,000 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)
275,000
1 Ft.
8
8
8
7
7
6
6
6
275,000
2 Ft.
8
8
7
7
7
6
6
6
275,000
3 Ft.
7
7
7
7
7
6
6
6
Number of Heaters
Combined Input in
Thousands of Btu/hr
Manifold and Common Vent Diameters (Inches)
2
550,000
10
10
9
9
8
8
7
7
3
825,000
14
12
12
10
10
9
9
8
4
1,100,000
14
14
14
12
12
12
10
9
MODEL SBL85310NE(A) Input: 310,000 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)
310,000
1 Ft.
-
8
8
8
7
7
6
6
310,000
2 Ft.
8
8
8
7
7
7
6
6
310,000
3 Ft.
8
8
8
7
7
7
6
6
Number of Heaters
Combined Input in
Thousands of Btu/hr
Manifold and Common Vent Diameters (Inches)
2
620,000
12
10
10
9
9
8
8
7
3
930,000
14
14
12
12
10
10
9
9
4
1,240,000
16
14
14
14
12
12
10
9
MODEL SBL85366NE(A) Input: 366,000 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)
366,000
1 Ft.
-
-
-
8
8
7
7
6
366,000
2 Ft.
-
-
8
8
8
7
7
6
366,000
3 Ft.
-
8
8
8
7
7
6
6
Number of Heaters
Combined Input in
Thousands of Btu/hr
Manifold and Common Vent Diameters (Inches)
2
732,000
12
12
12
10
9
9
8
8
3
1,098,000
14
14
14
12
12
12
10
9
4
1,464,000
16
16
16
14
14
12
12
10
MODEL SBL85390NE(A) Input: 390,000 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)
390,000
1 Ft.
-
-
-
-
8
7
7
6
390,000
2 Ft.
-
-
-
8
8
7
7
6
390,000
3 Ft.
-
-
8
8
8
7
7
6
Number of Heaters
Combined Input in
Thousands of Btu/hr
Manifold and Common Vent Diameters (Inches)
2
780,000
12
12
12
10
10
9
9
8
3
1,170,000
16
14
14
14
12
12
10
9
4
1,560,000
16
16
16
14
14
14
12
10
Summary of Contents for SBL85275NE
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