Enclosure thermal calculator
Internal heat + enclosure size + temps → is natural cooling enough, fan/AC needed.
How to use
- Enter the calculation conditions
Enter the dimensions, loads, speeds or operating conditions requested by the form.
- Run the calculation
The tool applies the formulas shown on this page to the entered values.
- Review the result
Review the resulting specification and checks, then verify them against the cited source, current standard and real operating conditions before use.
Core formula
A = 1.8 · H · (W + D) + 1.4 · W · D
Example using default values
A = 1.8 · 2 · (0.8 + 0.4) + 1.4 · 0.8 · 0.4 = 4.77 m²
Source: IEC 60890; Rittal enclosure thermal technical guide.
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