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taBle 7. 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 13) and tables
below which give sizing and data based upon NFPA 54/ANSI
Z223. 2006.
model 500
input: 500,000 btu/hr
Vent connector size: 8 inches
Input (btu/hr)
Rise
500,000
1 Ft.
500,000
2 Ft.
500,000
3 Ft.
Number of 500
Combined
heaters
Input (btu/hr)
2
1,000,000
3
1,500,000
4
2,000,000
Number of 500
Combined
heaters
Input (btu/hr)
2
1,000,000
3
1,500,000
4
2,000,000
6
8
-
10
10
10
10
10
multiple fan assisted water heaters
6
8
14
14
16
16
18
18
combination of multiple fan assisted and natural draft water heaters
6
8
16
14
18
18
20
20
Total Vent height (Feet)
10
15
Vent Connector Diameter (Inches)
10
10
10
9
9
9
Total Vent height (Feet)
10
15
Manifold and Common Vent Diameter (Inches)
12
12
14
14
16
16
Total Vent height (Feet)
10
15
Manifold and Common Vent Diameter (Inches)
14
14
16
16
18
18
18
20
30
50
9
8
8
9
8
8
9
8
7
20
30
50
10
10
9
14
12
12
14
14
12
20
30
50
12
12
10
14
14
12
16
16
14
100
7
7
7
100
8
10
12
100
9
10
12
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