August 12th, 2013. According to latest information from Rosenheim, the translations of the new ift-guideline WA-17/1 dated February 2013 and of the revised guideline WA-08/2 dated July 2013 still are a long time in coming. Further delays will make them available not before end of August.

Come around regularily, I will keep you informed at this point.

August 1st, 2013. As reported in previous articles, a research project (see article here) has given a new, measured basis for the BF data sheets ‘Psi-values for windows’ (for more info about those data sheets see this article). ift Rosenheim has published a description of the measurement method in a second guideline for thermally improved spacers, WA-17/1 (see article here).

End of July, part 1 of the ift-guideline to this matter, WA-08 “Thermally improved spacers – Part 1: Determination of representative Ψ-values for profile sections of windows was updated and published with the number WA-08/2. With the revision, the determination of the „all-inclusive“-input value for spacer including desiccant and butyle, the so-called λ_eq,2B-value (2-Box-Lambda-value) was incorporated in the guideline. Now, this measured value determination is an admissible method for the simulation of the representative Ψ-values for the BF data sheets.

The ift-guideline can be ordered here in German language. An English version will follow soon.