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    Construction & Electrical

    Wall Heat Flow Calculator

    Wall Heat Flow Calculator performs a browser-local calculation using measurements and quantities you control. The results are presented as labelled figures so each number is easy to interpret. Steady-state heat transfer only; thermal bridges and air leaks are not included.

    MAKE IT SIMPLE
    Formula assumptions and scope

    Steady-state heat transfer only; thermal bridges and air leaks are not included.

    Result

    Worked examples

    U-value (W/m² K): 0.5, Wall area (m²): 45, Temperature difference (K): 20

    Heat flow: 450 W

    Using these sample input values gives the first labelled output above. Steady-state heat transfer only; thermal bridges and air leaks are not included.

    Questions & answers

    Can I use the default numbers for purchasing or safety certification?

    No. Replace the examples with your real values. Steady-state heat transfer only; thermal bridges and air leaks are not included.

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