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The energy saving calculation results from a comparison between conventional flow and pressure control with variable speed pumps or fans (i.e. with Variable Frequency Drives).
Note: The flow rate varies with the rotation, and pressure with the square of the rotation, this means that in 70% of the rotation will have a theoretical value of 50% nominal pressure.

 
Flow (%) Time of operation per day (in hours) Flow (%) Time of operation per day (in hours)
100
50
90
40
80
30
70
20
60
10

Calculate Return

Result

Annual Savings (kWh) Annual Savings ()
Payback (months)
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