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Plant Engineering Calculator

Chiller Setpoint Savings Calculator — Leaving Water Reset & Annual kWh

Estimate annual chiller savings from a chilled-water setpoint reset using measured baseline kW and an entered percent-power improvement per degree of reset.

Inputs

Results

Estimated power saved 4.50 kW
Estimated new power 295.50 kW
Annual energy saved 22500 kWh
Annual cost saved $2250

Formula

saved kW=baseline kW×reset degrees×saving factor; annual kWh=saved kW×hours.

Worked example

A 300 kW chiller with a validated 1.5%/°C response and a 1°C reset screens at 4.5 kW savings.

Assumptions & limits

  • The saving factor is plant-specific and should be derived from trend data or OEM performance maps.
  • Check humidity, coil authority, process loads, pumping and comfort before resetting temperature.

FAQs

What does this Chiller Setpoint Savings Calculator calculate?

Estimate annual chiller savings from a chilled-water setpoint reset using measured baseline kW and an entered percent-power improvement per degree of reset.

Can I use the result for final equipment selection?

Use it as a transparent engineering and energy-screening result. Verify final decisions with measured site data, OEM curves, applicable standards and operating limits.

Why does MAXScanner show assumptions?

Plant calculations can look exact while depending heavily on operating assumptions. Showing them makes scenarios auditable and easier to compare.

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Last updated: 17 September 2026