Passivhaus is becoming more and more popular in the UK as well as across the rest of the World. With this, the independent test centre, ift Rosenheim, has developed a new Passivhaus certification for windows. Internorm, with its wide range of low energy window and door systems, has recognised the many benefits of this certification and as a result it now has products certified by the centre as Passivhaus components. 

ift Rosenheim GmbH is based in Germany and is a registered European institution for testing, surveillance and certification. With international accreditation according to DIN EN ISO/IEC 17025, the centre is authorised for setting rules for both defining and ensuring quality.

In terms of Passivhaus certification, in addition to testing the thermal performance of the systems, Rosenheim is also interested in the physical tests of the window and its performance when it comes to water tightness, air permeability and shock resistance. In addition, the thermal performance of Rosenheim’s certification is very detailed and, with this, includes the temperature factor of the glass edge and of the main building. It also measures the average temperature factor of the frame profile as well as the Uw installed.

We are very pleased to be working with ift Rosenheim and the company’s stringent certification procedures are ideal in really showing our customers not only where our products are suitable for Passivhaus but also their true performance abilities. This certification is fairly new to the UK but as a window and door manufacturer specialising in low energy products, we feel that specifiers and end customers should start to look for this certification when selecting products for passive houses.