Thermolec Application &Technical Notes - Manual (Page 6)

Chart to determine the required kilowatts
For a rough estimate, use the chart above.
Example:
Find the KW required to raise 2000 CFM from -10 to 40 ºF.
D
T = 40 + 10 = 50 ºF.
Lay a straightedge across the chart from 50 on the
D
T scale to 2000 on the CFM scale.
Find the required KW where the straightedge intersects the KW scale.
For this example, the KW required is approximately 35 KW.
You may decide to add any safety factor or loss allowance.
1
2
3
4
5
6
8
10
20
30
40
50
60
80
100
D
T CFM
KW
100
200
300
400
500
600
800
1000
2000
3000
4000
5000
6000
8000
10.000
120
100
150
175
200
250
130
110
55
27
22
17
12
9
6
4
2
1.5
.75
32
90
80
70
60
50
45
40
35
30
25
20
15
10
7
3
5
2
1.0
.50
Abacus to determine the Required Kilowatts
THREE EASY STEPS