A low-cost computer-assisted energy diagnostic package to improve overall energy efficiency of existing and new buildings.

Develops and tests a low-cost computer-assisted diagnostic package to supply the architect and engineer with key information and understanding of the energy use, balance and resulting saving potential of existing and new buildings. The energy balance is shown in a standard graph. Heat losses are calculated in oil equivalent. The program has its own database for typical thermal performance values of different building types and meteorological data of 26 sites within Switzerland. The program compares calculated energy consumption with actual energy use (to validate the database) and thenoptimizes energy use.