// multi-utility computation suite · offline · instant · precise
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eng.thermal-bridge-psi-value Calculator
Calculates the linear thermal transmittance (psi value) for a thermal bridge from 3D heat flow modelling or simplified calculation. Thermal bridges at junctions, edges, and penetrations reduce the effective thermal performance of insulated walls — psi values are typically 0.01–0.2 W/mK.
Inputs
U Junction W Mk
Reference formula or conversion factor shown for context.
U1 W M2K
Reference formula or conversion factor shown for context.
U2 W M2K
Reference formula or conversion factor shown for context.
L1 M
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
L2 M
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
Results
linear thermal transmittance Ψ (W/m·K)
Sample size or count used in the calculation.
heat loss through bridge per metre (W/m at ΔT=20K)
The decrease or degradation from the baseline.
Ψ = L²D - Σ(Ui·li)
Reference formula or conversion factor shown for context.
classification
Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.
typical values
The computed numeric or monetary value.
remedy
Reference formula or conversion factor shown for context.