THERMAL BRIDGES IN BUILDING ENVELOPES.

The temperature distribution and the heat flow, when thermal bridges are involved, are either two or three dimensional and can be studied using the Laplace differential equation. The following presentation of the calculations are proposed: graphical presentation of heat flowlines; numerical presentation of L equals U multiplied by Z for each 'room to room' connection involved (L-values are replaciang U-values in using the results for calculation of heat losses); graphical and/or numerical presentation of the surface temperatures of the building elements involved; formulas which enable to gain surface temperatures for other temperature differences between the rooms as where considered in the computer calculation.