TECHNICAL
KILOWATT HOURS TO HEAT WATER
Quantity of Water
Temperature Rise
Cubic
Ft.
Gals
Litres
°F
20
40
60
80
100
120
140
°C
6.67
4.44
15.6
26.7
37.8
49
60
Kilowatts to heat in one hour
0.66
5
18.7
0.3
0.5
0.8
1.1
1.3
1.6
1.9
1.3
10
36.8
0.5
1.1
1.6
2.1
2.7
3.2
3.7
2.0
15
56.6
0.8
1.6
2.4
3.2
4.0
4.8
5.6
2.7
20
76.5
1.1
2.2
3.2
4.3
5.3
6.4
7.5
3.3
25
93.5
1.3
2.7
4.0
5.3
6.7
8.0
9.3
4.0
30
113.3
1.6
3.2
4.8
6.4
8.0
9.6
12.0
5.3
40
150.1
2.1
4.0
6.4
8.5
11.0
13.0
15.0
6.7
50
189.7
2.7
5.4
8.0
10.7
13.0
16.0
19.0
8.0
60
226.6
3.3
6.4
9.6
12.8
16.0
19.0
22.0
9.4
70
266.2
3.7
7.5
11.2
15.0
19.0
22.0
26.0
10.7
80
303.0
4.3
8.5
13.0
17.0
21.0
26.0
30.0
12.0
90
339.8
5.0
10.0
14.5
19.0
24.0
29.0
34.0
13.4
100
379.5
5.5
11.0
16.0
21.0
27.0
32.0
37.0
16.7
125
472.9
7.0
13.0
20.0
27.0
33.0
40.0
47.0
20.0
150
566.4
8.0
16.0
24.0
32.0
40.0
48.0
56.0
23.4
175
662.7
9.0
18.0
28.0
37.0
47.0
56.0
65.0
26.7
200
756.1
11.0
21.0
32.0
43.0
53.0
64.0
75.0
33.7
250
954.4
13.0
27.0
40.0
53.0
67.0
80.0
93.0
40.0
300
1132.8
16.0
32.0
47.0
64.0
80.0
96.0
112.0
53.4
400
1512.3
21.0
43.0
64.0
85.0
107.0
128.0
149.0
66.8
500
1891.8
27.0
53.0
80.0
107.0
133.0
160.0
187.0

For Heating Flowing Water

KW = Liters/min. x Temperature Rise (°C) x 0.076
 
 

For Heating Water in Tanks:

KW = Liters x Temperature Rise (°C)
 
 790 x Heat-up Time (hrs.)
  


            

 

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