Free calculator

Air conditioning calculator

Estimate frigories, thermal capacity and BTU from room volume, climate and solar exposure.

✓ Uses real room volume✓ Adjustable exposure✓ Commercial size reference
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Room and thermal load

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Frigories, kW and BTU

We first estimate a thermal load from room volume and an adjustable factor. Then we show approximate equivalents and the next common commercial size.

Width × length × height × W/m³ × exposure

Why floor area alone is not enough

Two rooms with the same floor area can need different capacities because of height, orientation, insulation, windows, climate and occupancy.

Before you buy

Use the result to narrow down models, not as a final design calculation. For complex spaces or commercial premises, request a professional thermal study.