18
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 13) and tables
below which give sizing and data based upon NFPA 54/ANSI
Z223. 2006.
taBle 6. teChniCal data Venting
model sBl81120ne
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
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 sBl81154ne
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
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 sBl95180/199ne
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
thousands of Btu/hr
manifold and Common Vent diameter (inches)
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
Summary of Contents for SBL81120NE
Page 49: ...49 Model Dimension A SBL 120 154 68 SBL 180 199 250 A 76...
Page 50: ...50 Notes...
