15
Servicing should only be performed by a Qualified Service Technician
TYPE B GAS VENT: Single Gas Fired Tank-Type Heater
When venting single tank type water heater using Type B vent pipe, follow the tables below which give sizing and data
based upon NFPA 54 ANSI Z223.1.
MODELS
TOTAL VENT HEIGHT (FEET)
MODEL SBL85275NE(A)
Input: 275,000 Btu/hr
Vent Connector Diameter: 6 inches
Vent Type: Type B Double-Wall Gas Vent
Vent Connection: Connected directly to Vent
Number of Appliances: Single
Appliance Venting: Fan assist
Note: Refer to NFPA 54/ ANSI Z223.1 for
maximum vent diameter.
6
8
10
15
20
30
50
100
Lateral (Feet)
Minimum Vent Diameter (Inches)
0
6
6
6
5
5
5
5
5
2
7
7
7
6
6
6
5
5
4
7
NA
NA
NA
NA
NA
NA
NA
5
NA
7
7
6
6
6
5
5
6
7
NA
NA
NA
NA
NA
NA
NA
8
NA
7
NA
NA
NA
NA
NA
NA
10
NA
NA
7
6
6
6
6
5
15
NA
NA
NA
6
6
6
6
5
20
NA
NA
NA
NA
6
6
6
5
30
NA
NA
NA
NA
NA
6
6
6
50
NA
NA
NA
NA
NA
NA
NA
6
MODEL SBL85310NE(A)
Input: 310,000 Btu/hr
Vent Connector Diameter: 6 inches
Vent Type: Type B Double-Wall Gas Vent
Vent Connection: Connected directly to Vent
Number of Appliances: Single
Appliance Venting: Fan assist
Note: Refer to NFPA 54/ ANSI Z223.1 for
maximum vent diameter.
Lateral (Feet)
Minimum Vent Diameter (Inches)
0
6
6
6
6
5
5
5
5
2
7
7
7
6
6
6
6
5
4
7
NA
NA
NA
NA
NA
NA
NA
5
NA
7
7
6
6
6
6
5
6
7
NA
NA
NA
NA
NA
NA
NA
8
NA
7
NA
NA
NA
NA
NA
NA
10
NA
NA
7
6
6
6
6
6
15
NA
NA
NA
7
6
6
6
6
20
NA
NA
NA
NA
6
6
6
6
30
NA
NA
NA
NA
NA
6
6
6
50
NA
NA
NA
NA
NA
NA
NA
6
MODEL SBL85366NE(A)
Input: 366,000 Btu/hr
Vent Connector Diameter: 6 inches
Vent Type: Type B Double-Wall Gas Vent
Vent Connection: Connected directly to Vent
Number of Appliances: Single
Appliance Venting: Fan assist
Note: Refer to NFPA 54/ ANSI Z223.1 for
maximum vent diameter.
Lateral (Feet)
Minimum Vent Diameter (Inches)
0
6
6
6
6
6
6
6
5
2
8
8
7
7
6
6
6
6
4
8
NA
NA
NA
NA
NA
NA
NA
5
NA
8
7
7
6
6
6
6
6
8
NA
NA
NA
NA
NA
NA
NA
8
NA
8
NA
NA
NA
NA
NA
NA
10
NA
NA
7
7
7
6
6
6
15
NA
NA
NA
7
7
6
6
6
20
NA
NA
NA
NA
7
6
6
6
30
NA
NA
NA
NA
NA
7
6
6
50
NA
NA
NA
NA
NA
NA
NA
6
MODEL SBL85390NE(A)
Input: 390,000 Btu/hr
Vent Connector Diameter: 6 inches
Vent Type: Type B Double-Wall Gas Vent
Vent Connection: Connected directly to Vent
Number of Appliances: Single
Appliance Venting: Fan assist
Note: Refer to NFPA 54/ ANSI Z223.1 for
maximum vent diameter.
Lateral (Feet)
Minimum Vent Diameter (Inches)
0
7
6
6
6
6
6
6
6
2
8
8
7
7
7
6
6
6
4
8
NA
NA
NA
NA
NA
NA
NA
5
NA
8
7
7
7
6
6
6
6
8
NA
NA
NA
NA
NA
NA
NA
8
NA
8
NA
NA
NA
NA
NA
NA
10
NA
NA
8
7
7
6
6
6
15
NA
NA
NA
7
7
7
6
6
20
NA
NA
NA
NA
7
7
6
6
30
NA
NA
NA
NA
NA
7
6
6
50
NA
NA
NA
NA
NA
NA
NA
6
Summary of Contents for SBL85275NE
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