Setpoint Optimization Calculator
Energy savings from supply air temperature reset.
Inputs
%
%
Results
VFD power savings (kW)
9.78
Power reduction (%)
48.8
Annual VFD savings ($)
$7,043
Current power (kW)20.05
Reduced power (kW)10.26
Annual kWh saved58,694
Estimated VFD cost ($)$5,625
VFD payback (years)0.8
Flow reduction (%)20
SAT reset savings ($/yr)$4,500
Total combined savings ($)$11,543
Pressure Reduction (%)36%
How to Use This Calculator
- Enter Fan/pump motor (HP), Current speed (%), and Reduced speed (%).
- Set Annual run hours, Electricity rate ($/kWh), and Current SAT setpoint (°F).
- Adjust Reset SAT setpoint (°F), Annual cooling cost ($) as needed.
- Review VFD power savings (kW), Power reduction (%), and Annual VFD savings ($) ($).
- Use Current power (kW) and Reduced power (kW) to inform your decision.
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