Detail Drawing: Your report will feature a clean, 2D cross-section of the junction you're analyzing. This drawing shows all the specified layers, from the outer brick leaf to the internal plasterboard, ensuring the model accurately represents your design.

Temperature Distribution Result: This is where your design's performance comes to life. 🌡️ AutoPSI generates a color-coded thermal map of the junction. This powerful visual instantly shows how temperature distributes across the detail. Warm colors (red/orange) represent the heated interior, while cool colors (blue/green) show the colder exterior. This map makes it incredibly easy to spot a "thermal bridge"—the exact path where heat is escaping.

What it is: The Linear Thermal Transmittance, or Ψ-value, quantifies the extra heat loss that occurs at a specific junction, over and above the heat lost through the plain wall. Think of it as measuring the energy leak at the seams of your building.

Why it matters: A lower Ψ-value means better energy performance. This value is essential for overall building energy calculations (like SAP in the UK) and demonstrating compliance with building regulations. In our example, the calculated Ψ-value is 0.036 W/m·K.

The Temperature Factor is a critical safety check. It assesses if the internal surface temperature at the coldest point of the junction is warm enough to prevent condensation and, consequently, mould growth.

Why it matters: This value protects the health of the building and its occupants. The report compares your calculated fRsi​ value to a required critical value (e.g., 0.75 for UK residential buildings). If your value is higher, the risk is low. In our example, the result of 0.929 is well above the 0.75 threshold, indicating a Low Risk of mould.