Chiller Sizing Calculator
The Chiller Sizing Calculator picks the chiller capacity (TR/kW) and efficiency for a cooling load with a design margin. Example: for a 300 kW cooling load on a water-cooled chiller (COP 5.5), Recommended capacity = 100.1 TR, Capacity = 352 kW, Efficiency = 0.64 kW/TR (per ASHRAE 90.1-2019 Table 6.8.1 | AHRI 550/590 | ASHRAE 2021 Ch.2).
How it works
Computed from your inputs per ASHRAE 90.1-2019 Table 6.8.1 | AHRI 550/590 | ASHRAE 2021 Ch.2.
Worked example (HVAC & Cooling)
Inputs: a 300 kW cooling load on a water-cooled chiller (COP 5.5).
| Result | Value |
|---|---|
| Recommended capacity | 100.1 TR |
| Capacity | 352 kW |
| Efficiency | 0.64 kW/TR |
Computed live by WorkHive's calculation engine; standard: ASHRAE 90.1-2019 Table 6.8.1 | AHRI 550/590 | ASHRAE 2021 Ch.2.
How to use this calculator
- Enter the figures for the duty you are sizing: the worked example below uses a 300 kW cooling load on a water-cooled chiller (COP 5.5).
- The calculator returns Recommended capacity, Capacity, Efficiency, computed per ASHRAE 90.1-2019 | AHRI 550/590.
- Check the worked example to confirm the method matches how you would do it by hand, then run your own numbers in the interactive tool.
FAQ
What is a chiller sizing calculator TR?
The Chiller Sizing Calculator is a free online tool that computes picks the chiller capacity (TR/kW) and efficiency for a cooling load with a design margin. It shows the formula and a fully worked example so you can check the method, not just the number.
How is it calculated?
The result is computed from your inputs following ASHRAE 90.1-2019 | AHRI 550/590. The worked example on this page shows a real computation with real numbers.
Is the calculator free?
Yes. WorkHive's engineering calculators are free to use, no sign-up needed for the tools. WorkHive is a free, offline-first maintenance platform built for Philippine industrial plants.
Run it on your own numbers
Open the interactive Chiller Sizing Calculator in WorkHive: free, no sign-up needed for the calculators.