A.O. Smith BTN 120 THRU 400/A Series warranty Technical Data Venting

TABLE 6. TECHNICAL DATA VENTING

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 4) and tables below which give sizing and data based upon NFPA 54/ANSI Z223. 1992.

MODEL BTN-120

Input: 120,000 Btu/hr				Total Vent Height (Feet)
Vent Connector Size: 5 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	Combined Input
BTN 120 Heaters	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 BTN-154
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	Combined Input
BTN 154 Heaters	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 BTN-180,199, 200
Input: 180,000, 190,000 and 199,000 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)
	180,000	1 Ft.	7	7	6		6	6	6	6	6
	190,000	1 Ft.	7	7	7		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
	190,000	2 Ft.	7	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
	190,000	3 Ft.	6	6	6		6	6	6	6	6
	199,000	3 Ft.	6	6	6		6	6	6	6	6
Number of	Combined Input
BTN Heaters	in Thousands of Btu/hr		Manifold & Common Vent Diameter (Inches)
2	360,000		7	7	6		6	6	6	6	6
	380,000		7	7	7		6	6	6	6	6
	398,000		6	7	7		6	6	6	6	6
	540,000		7	6	6		6	6	6	6	6
3	570,000		7	6	6		6	6	6	6	6
	597,000		6	7	6		6	6	6	6	6
	720,000		6	6	6		6	6	6	6	6
4	760,000		6	6	6		6	6	6	6	6
	796,000		6	6	6		6	6	6	6	6

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