When I calculate the timber frame exterior wall using WUFI and the program for thermal and vapor analysis from Rowa-Soft, I get very different results. With WUFI, the total moisture content in the component decreases significantly (which is therefore acceptable), but with the Rowa-Soft program, the vapor diffusion requirements are not met. Which result is more likely? (The building is 33 years old and has no vapor barriers anywhere).
Hello Truk,
unfortunately, I am not familiar with the two programs you used for your calculations.
The software for the Energy Saving Ordinance all seem to be somewhat immature at this stage. However, it is an extremely complex subject.
In the October 2008 issue (No. 10) of the German Engineering Journal, test results from six programs for the Energy Saving Ordinance (all professional software) were presented. All programs were tested on the same building with identical inputs, yet they produced six different results.
This means that none of the results can necessarily be regarded as correct. Therefore, currently, software for calculations according to the Energy Saving Ordinance cannot fully be relied upon.
This may not help you directly, but it might explain the differing outcomes.
Best regards from the Osnabrück region
unfortunately, I am not familiar with the two programs you used for your calculations.
The software for the Energy Saving Ordinance all seem to be somewhat immature at this stage. However, it is an extremely complex subject.
In the October 2008 issue (No. 10) of the German Engineering Journal, test results from six programs for the Energy Saving Ordinance (all professional software) were presented. All programs were tested on the same building with identical inputs, yet they produced six different results.
This means that none of the results can necessarily be regarded as correct. Therefore, currently, software for calculations according to the Energy Saving Ordinance cannot fully be relied upon.
This may not help you directly, but it might explain the differing outcomes.
Best regards from the Osnabrück region
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