Technical information

15
Servicing should only be performed by a Qualied 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.
Total Vent Height (Feet)
MODEL BCL3 95T199 6NOX
Input: 199,000 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 5 5 5 5 5 5
2 6 6 6 5 5 5 5 5
4 6 NA NA NA NA NA NA NA
5 NA 6 6 6 5 5 5 5
6 6 NA NA NA NA NA NA NA
8 NA 6 NA NA NA NA NA NA
10 NA NA 6 6 5 5 5 5
15 NA NA NA 6 6 5 5 5
20 NA NA NA NA 6 5 5 5
30 NA NA NA NA NA 6 5 5
Total Vent Height (Feet)
MODEL (A)BCL3 85T275 6NOX
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
Total Vent Height (Feet)
MODEL (A)BCL3 85T390 6NOX
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.
6 8 10 15 20 30 50 100
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