FCU Selection Calculator
The FCU Selection Calculator picks fan-coil units and chilled-water pipe size for a set of rooms from their cooling loads. Example: for four office rooms at 5 kW cooling each on 7/12 °C chilled water, Selected FCU = FCU-800, Unit capacity = 5.6 kW, Total load = 6.37 TR (per ARI 440 | ASHRAE 62.1 | ASHRAE 90.1 | PSME).
How it works
Computed from your inputs per ARI 440 | ASHRAE 62.1 | ASHRAE 90.1 | PSME.
Worked example (HVAC & Cooling)
Inputs: four office rooms at 5 kW cooling each on 7/12 °C chilled water.
| Result | Value |
|---|---|
| Selected FCU | FCU-800 |
| Unit capacity | 5.6 kW |
| Total load | 6.37 TR |
Computed live by WorkHive's calculation engine; standard: ARI 440 | ASHRAE 62.1 | ASHRAE 90.1 | PSME.
How to use this calculator
- Enter the figures for the duty you are sizing: the worked example below uses four office rooms at 5 kW cooling each on 7/12 °C chilled water.
- The calculator returns Selected FCU, Unit capacity, Total load, computed per ASHRAE 62.1 | 90.1.
- 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 fan coil unit selection calculator?
The FCU Selection Calculator is a free online tool that computes picks fan-coil units and chilled-water pipe size for a set of rooms from their cooling loads. 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 62.1 | 90.1. 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 FCU Selection Calculator in WorkHive: free, no sign-up needed for the calculators.