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A.O. Smith HW 610 ユーザーズマニュアル

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TABLE 5, COMBINED VENT SIZING TABLES
MODEL HW-300 BOILER
Input: 300,000 Btuh
Draft Hood Outlet 8"
Required Connector or Smoke Pipe Diameter
Connector 
Rise in Feet
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Connector Diameter (in Inches)
1
10
10
10
10
10
10
10
10
10
2
10
10
10
10
10
10
10
10
10
3
10
10
10
10
10
10
10
10
10
4 or more
Number 
if Units 
Combined
Total Input
Btuh x 1000
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Manifold and Common Vent Diameter (in Inches)
2
600
14
12
12
12
10
10
10
10
10
3
900
16
14
14
14
12
12
12
12
12
4
1200
18
16
16
14
14
14
14
12
12
MODEL HW-399 BOILER
Input: 399,000 Btuh
Draft Hood Outlet 10"
Required Connector or Smoke Pipe Diameter
Connector 
Rise in Feet
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Connector Diameter (in Inches)
1
12
12
12
12
12
12
12
12
12
2
12
12
12
10
10
10
10
10
10
3
12
10
10
10
10
10
10
10
10
4 or more
10
10
10
10
10
10
10
10
10
Number 
if Units 
Combined
Total Input
Btuh x 1000
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Manifold and Common Vent Diameter (in Inches)
2
798
14
14
14
12
12
12
12
12
12
3
1197
18
16
16
14
14
14
14
14
12
4
1596
20
20
18
16
16
16
14
14
14
MODEL HW-420 BOILER
Input: 420,000 Btuh
Draft Hood Outlet 10"
Required Connector or Smoke Pipe Diameter
Connector 
Rise in Feet
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Connector Diameter (in Inches)
1
12
12
12
12
12
12
12
12
12
2
12
12
12
10
10
10
10
10
10
3
12
10
10
10
10
10
10
10
10
4 or more
10
10
10
10
10
10
10
10
10
Number 
if Units 
Combined
Total Input
Btuh x 1000
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Manifold and Common Vent Diameter (in Inches)
2
840
14
14
14
12
12
12
12
12
12
3
1260
18
16
16
14
14
14
14
14
12
4
1680
20
20
18
16
16
16
14
14
14
MODEL HW-520 BOILER
Input: 520,000 Btuh
Draft Hood Outlet 10"
Required Connector or Smoke Pipe Diameter
Connector 
Rise in Feet
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Connector Diameter (in Inches)
1
14
14
14
12
12
12
12
12
12
2
12
12
12
12
12
12
12
12
12
3
12
12
12
12
10
10
10
10
10
4 or more
12
12
12
12
10
10
10
10
10
Number 
if Units 
Combined
Total Input
Btuh x 1000
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Manifold and Common Vent Diameter (in Inches)
2
1040
16
16
14
14
14
14
12
12
12
3
1560
20
18
18
16
16
14
14
14
14
4
2080
22
22
20
18
18
18
16
16
14
5
2600
26
24
22
20
20
18
18
18
18
6
3120
28
26
24
22
22
20
20
18
18
7
3640
30
28
26
24
24
22
22
20
20
8
4160
32
30
28
26
24
24
22
22
20
MODEL HW-610 BOILER
Input: 610,000 Btuh
Draft Hood Outlet 12"
Required Connector or Smoke Pipe Diameter
Connector 
Rise in Feet
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Connector Diameter (in Inches)
1
16
14
14
14
14
14
14
14
14
2
14
14
14
14
14
12
12
12
12
3
14
14
12
12
12
12
12
12
12
4 or more
12
12
12
12
12
12
12
12
12
Number 
if Units 
Combined
Total Input
Btuh x 1000
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Manifold and Common Vent Diameter (in Inches)
2
1220
18
18
16
16
14
14
14
14
14
3
1830
22
20
20
18
18
16
16
16
14
4
2440
26
24
22
20
20
18
18
18
16
5
3050
28
26
26
24
22
22
20
20
18
6
3660
32
28
28
26
24
24
22
22
20
7
4270
34
32
30
28
26
24
24
22
22
8
4880
36
34
32
30
28
26
26
24
24
9
5490
38
36
34
30
30
28
28
26
24
10
6100
40
38
36
32
30
30
28
26
26
11
6710
42
38
38
34
32
30
28
28
26
12
7320
44
42
38
36
34
32
32
30
28
MODEL HW-670 BOILER
Input: 660,000 or 670,000 Btuh
Draft Hood Outlet 12"
Required Connector or Smoke Pipe Diameter
Connector 
Rise in Feet
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Connector Diameter (in Inches)
1
16
14
14
14
14
14
14
14
14
2
14
14
14
14
14
12
12
12
12
3
14
14
12
12
12
12
12
12
12
4 or more
12
12
12
12
12
12
12
12
12
Number 
if Units 
Combined
Total Input
Btuh x 1000
Total Vent Height (Measured in Feet Above Draft Hood)
10
15
20
30
40
50
60
80
100
Manifold and Common Vent Diameter (in Inches)
2
1220
18
18
16
16
14
14
14
14
14
3
1830
22
20
20
18
18
16
16
16
14
4
2440
26
24
22
20
20
18
18
18
16
5
3050
28
26
26
24
22
22
20
20
18
6
3660
32
28
28
26
24
24
22
22
20
7
4270
34
32
30
28
26
24
24
22
22
8
4880
36
34
32
30
28
26
26
24
24
9
5490
38
36
34
30
30
28
28
26
24
10
6100
40
38
36
32
30
30
28
26
26
11
6710
42
38
38
34
32
30
28
28
26
12
7320
46
44
40
38
36
34
34
32
30
Known: 
(5)  model  HW-610  boilers.  (See  illustration). 
Connector rise - 2' (Note 1' is minimum). Total vent 
height 30'.
Problem: 
Determine  diameter  of  connector,  manifold  and 
common vent.
Procedure:  Enter the top of the HW-610 table (total vent height) 
at  30'  and  the  side  at  2'  (connector  rise).  A  14" 
connector diameter is indicated for each connector 
rise.
To determine the manifold and common vent size, enter table on this 
page (total vent height) at 30 and the side at 5 boilers. A manifold 
diameter of 24" (610 mm) is indicated.