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Commercial Gas Boilers
Revised November 2009
Page 3 of 4
www.hotwater.com
AOSDG25300
INPUT/OUTPUT, FLOW RATE (GALLONS AND LITRES PER MINUTE) AND PRESSURE DROP
MODEL
NUMBER
BTU/HR.
INPUT
BTU/HR.
OUTPUT
20°F/11°C DELTA T 30°F/17°C DELTA T 40°F/22°C DELTA T
MAXIMUM FLOW
PRESSURE DROP
MAXIMUM FLOW
PRESSURE DROP
MAXIMUM FLOW
PRESSURE DROP
GPM LPM
FEET
METERS
GPM LPM
FEET
METERS
DW-720
720,000
583,200
59 223 3.5 1.1 39 149 1.7 0.5 29 111 1.0 0.3
DW-840
840,000
680,400
69 260 4.8 1.5 46 173 2.1 0.6 34 130 1.5 0.5
DW-960
960,000 777,600
79 297 6.8 2.1 52 198 3.3 1.0 39 149 1.9 0.6
DW-1080
1,080,000
885,600
89 339 4.5 1.4 60 226 2.1 0.6 45 169 1.4 0.4
DW-1210
1,210,000
992,200
100 379 5.3 1.6 67 253 2.7 0.8 50 190 1.6 0.5
DW-1350
1,350,000 1,107,000
112 423 6.8 2.1 75 282 3.2 1.0 56 212 1.8 0.5
DW-1490
1,490,000
1,184,000
120 453 7.9 2.4 80 302 3.9 1.2 60 226 2.1 0.6
DW-1610
1,610,000
1,288,000
130 492 9.5 2.9 87 328 5.0 1.5 65 246 3.0 0.9
DW-1810
1,810,000
1,448,000
146 554
12.0
3.7 98 369 6.2 1.9 73 277 3.9 1.2
Pressure drop shown is loss through boiler only, and does not include any additional piping.
DIMENSIONS AND SHIPPING WEIGHTS
MODEL
NUMBER
INCHES OR
CM
DIMENSIONS
SHIPPING
WEIGHT
A B C D E F G H L M N P
DW-720
Inches
46-1/2 29-5/8
54-3/4 1-1/4
7-3/4
15-1/2 17-1/4
4-1/4
1 12
15-1/2
32-1/8
780 Lbs.
CM
118.1
75.2
139.1
3.2
19.7
39.4
43.8
10.8
2.5
30.5 39.4
81.6
354 Kg
DW-840
Inches
52-1/5 29-5/8 54-3/4 1-1/4
7-3/4
15-1/2 17-1/4 4-1/4
1 14
16-1/2
31-1/8
950 Lbs.
CM
132.6
75.2
139.1
3.2
19.7 39.4
43.8
10.8
2.5
35.6
41.9
79.1
431 Kg
DW-960
Inches
57-3/4 29-5/8 54-3/4
1-1/4
7-3/4
15-1/2 17-1/4
4-1/4
1 14
16-1/2
32-1/8
950 Lbs.
CM
146.7
75.2
139.1
3.2
19.7
39.4
43.8
10.8
2.5
35.6
41.9 81.6
431 Kg
DW-1080
Inches
52-7/8 32-3/4
58
1-1/4
7-1/2
18-1/2 18-9/16
4
1-1/4
16
17-1/4
30-15/16
1000 Lbs.
CM
134.3
83.2
147.3
3.2
19.1
47
47.1
10.2
3.2
40.6 43.8 78.6
454 Kg
DW-1210
Inches
58-1/2
32-3/4
58
1-1/2
7-1/2
18-1/2 18-9/16
4
1-1/4
16
17-1/4
30-15/16
1075 Lbs.
CM
148.6
83.2
147.3
3.8
19.1
47
47.1
10.2
3.2
40.6 43.8 78.6
488 Kg
DW-1350
Inches
64-1/2 32-3/4
58
1-1/2
7-1/2
18-1/2 18-9/16
4
1-1/4
18 17 1/4
30-15/16
11 00 Lbs.
CM
163.8
83.2
147.3
3.8
19.1
47
47.1
10.2
3.2
45.7
45.7 78.6
499 Kg
DW-1480
Inches
69-1/2
34
60-1/2
1-1/2
7-1/2
18-1/2
19-1/8
4-1/2
1-1/4
18
13-3/4
31
11 25 Lbs.
CM
176.5
86.4
153.7
3.8
19.1
47
48.6
11.4
3.2
45.7
34.9
78.7
510 Kg
DW-1610
Inches
75 34
60-1/2
2
7-1/2
18-1/2
19-1/8 4-1/2 1-1/4
18
13-3/4
31
11 50 Lbs.
CM
190.5
86.4
153.7
5.1
19.1
47
48.6 11.4
3.2
45.7
34.9
78.7
522 Kg
DW-1810
Inches
82-1/2
34
60-1/2
2
7-1/2
18-1/2 19-1/8
4-1/2 1-1/4
20
13-3/4
31
1250 Lbs.
CM
209.6
86.4
153.7
5.1
19.1
47
48.6
11.4
3.2
50.8 34.9
78.7
567 Kg
Water connections on DW-720 through DW-960: 2”
Water connections on DW-1080 through DW-1810: 2-1/2”