A ‘Passivhaus’ is a building, for which thermal comfort can be achieved solely by post-heating or post-cooling of the fresh air mass, which is required to achieve sufficient indoor air quality conditions – without the need for additional recirculation of air.

Internorm is Europe’s leading manufacturer of passive house windows, and are at the forefront of the development of passive house window technology. Passive house windows are not just about heat-loss but also making use of (and managing) the heat from the sun using solar glass and advanced shading technology.

Internorm high performance, Passivhaus Windows & Doors are tested to rigorous standards, to ensure the highest levels of performance and air tightness as they are an essential part of the Passivhaus standard.

The requirement for Passivhaus is that the windows must have a Uw value of not more than 0.8W/m2K