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 7. technical data Venting
model 500
input: 500,000 btu/hr
Total Vent height (Feet)
Vent connector size: 8 inches
6
8
10
15
20
30
50
100
Input (btu/hr)
Rise
Vent Connector Diameter (Inches)
500,000
1 Ft.
-
10
10
10
9
8
8
7
500,000
2 Ft.
10
10
10
9
9
8
8
7
500,000
3 Ft.
10
10
9
9
9
8
7
7
multiple fan assisted water heaters
Total Vent height (Feet)
Number of 500
heaters
Combined
Input (btu/hr)
6
8
10
15
20
30
50
100
Manifold and Common Vent Diameter (Inches)
2
1,000,000
14
14
12
12
10
10
9
8
3
1,500,000
16
16
14
14
14
12
12
10
4
2,000,000
18
18
16
16
14
14
12
12
combination of multiple fan assisted and natural draft water heaters
Total Vent height (Feet)
Number of 500
heaters
Combined
Input (btu/hr)
6
8
10
15
20
30
50
100
Manifold and Common Vent Diameter (Inches)
2
1,000,000
16
14
14
14
12
12
10
9
3
1,500,000
18
18
16
16
14
14
12
10
4
2,000,000
20
20
18
18
16
16
14
12
Summary of Contents for (A)BCG3 85T500-8N
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