Jansen’s Steel window range moves steel window and door thermal efficiency, weather sealing and security to a new level while retaining ultra-slim sightlines.
Redefining the thermal performance of steel windows
Jansen has developed an advanced, uyltra thermally efficient steel window system which achieves u-values of as low as 0.8W/m2K, a Passiv Haus equivalent level of performance.
With a range of options specially designed for the renovation of industrial and loft-type windows ultra-slim profiles meet advanced levels of performance.