This standard describes the basics of thermal bridge calculation, i.e. calculation of temperature fields, heat flows and surface temperatures in construction details. The model equations describe stationary processes, i.e. states which occur by applying constant temperature conditions. The basis of the calculation is Fick’s heat conduction equations in 2D and 3D.
The standard contains a normative Annex A, which must be completed by all thermal bridge simulation programs. Due to the restriction to stationary processes, analytical solutions (or approximate solutions based on series expansions) exist for the test cases, against which numerical simulation results are compared.