During yesterday’s meeting in Rosenheim, the Working Group “Warm Edge” of the BF Bundesverband Flachglas agreed to update the data sheets “Psi-values for windows”. As a result of the latest research project of the Working Group, the representative Psi-values stated on the data sheets shall be simulated on the basis of measured equivalent thermal conductivity values of the warm-edge systems, and not as before with individual values of the sometimes complex product components.

The measurement method is described in a new guideline of ift Rosenheim, which will be published soon. Within the next weeks, the new data sheets will be available for free download on the BF websites. Warm-Edge manufacturers may utilize the old data sheets for their products until December 31st, 2013, after that deadline they will expire. You can find a first info (in German) about the research project here. More will follow in the relevant technical press – I will let you know here in my blog and in my literature list.

The Working Group “Warm Edge” consists of well-known manufacturers of warm-edge-systems, representatives from glass industry and members from higher education and research.

Do you have wishes or suggestions for the Working Group? If so, let me know!