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 BCL381T1206NOX

 

 

 

 

 

 

 

 

 

 

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

2 ft.

5

5

5

5

5

5

5

5

 

120,000

3 ft.

5

5

5

5

5

5

5

5

Number of 120 Heaters

Combined Input in

 

Manifold and Common Vent Diameter (Inches)

 

 

Thousands of Btu/hr

 

 

 

 

 

 

 

 

 

 

 

 

 

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 BCL381T1546NOX

 

 

 

 

 

 

 

 

 

 

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 154 Heaters

Combined Input in

 

Manifold and Common Vent Diameter (Inches)

 

 

Thousands of Btu/hr

 

 

 

 

 

 

 

 

 

 

 

 

 

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 BCL395T1806NOX/1996NOX

 

 

 

 

 

 

 

 

 

 

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

2 ft.

6

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

 

199,000

3 ft.

6

6

6

6

6

6

6

6

Number of Heaters

Combined Input in

 

Manifold and Common Vent Diameter (Inches)

 

 

Thousands of Btu/hr

 

 

 

 

 

 

 

 

 

 

 

 

 

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 (A)BCL395T2506NOX

 

 

 

 

 

 

 

 

 

 

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

2 ft.

7

7

7

7

6

6

6

6

 

250,000

3 ft.

7

7

7

7

6

6

6

6

Number of 250 Heaters

Combined Input in

 

Manifold and Common Vent Diameter (Inches)

 

 

Thousands of Btu/hr

 

 

 

 

 

 

 

 

 

 

 

 

 

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

14

Servicing should only be performed by a Qualified Service Technician

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American Water Heater 381T1206NOX, ULTRA LOW NOx SERIES 104, BCL Venting Tables Technical Venting Data, Type B GAS Vent
Page 15 Page 17

381T1546NOX, 395T1996NOX, BCL, 381T1206NOX, 395T2506NOX specifications

The American Water Heater Ultra Low NOx Series represents a significant advancement in water heating technology, aiming to meet stringent environmental regulations while delivering reliable hot water for residential applications. Models such as the 104,395T1806NOX, 395T2506NOX, 381T1206NOX, and BCL are designed to prioritize efficiency, performance, and compliance with the latest emission standards.

One of the defining features of the Ultra Low NOx Series is its innovative combustion technology. These water heaters utilize a state-of-the-art gas burner that dramatically reduces nitrogen oxide (NOx) emissions, ensuring compliance with local and federal regulations. This technology not only benefits the environment but also contributes to improved indoor air quality.

Efficiency is a hallmark of the Ultra Low NOx Series, with models designed to maximize energy savings while delivering consistent hot water. They feature a user-friendly, adjustable thermostat, providing homeowners with the ability to set their desired water temperature for optimal comfort. In addition, the insulation on these water heaters is designed to minimize heat loss, ensuring that energy consumption is kept to a minimum.

The Ultra Low NOx models are equipped with an easy-to-use digital control panel that allows homeowners to monitor and adjust settings with ease. This convenience is enhanced by advanced diagnostics, which provide real-time alerts regarding system performance and maintenance needs. This proactive approach helps extend the lifespan of the unit and enhances reliability.

Safety is another crucial characteristic of the Ultra Low NOx Series. Each model is equipped with safety features such as a flame rollout switch and a fully automatic gas shut-off, which ensure that the system operates safely under various conditions.

In terms of installation and maintenance, these models are designed with user-friendly features, making the process simpler for technicians. The compact design allows for flexible installation options, even in tighter spaces.

Overall, the American Water Heater Ultra Low NOx Series, including the 104,395T1806NOX, 395T2506NOX, 381T1206NOX, and BCL models, represents an excellent choice for homeowners seeking an efficient, reliable, and environmentally responsible water heating solution. With a focus on reducing emissions and enhancing performance, these models are built to meet the demands of today's conscientious consumers.
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