The larger profile of the Energeto 8000, with its 85 mm frame depth, makes effective use of the multi-chamber design principle. By utilising innovative carbon fibre reinforced inserts, internal chamber volumes are optimised all without the disadvantages of thermal bridging from steel inserts. Fully bonded double or triple glazed units allow Energeto 8000 windows to achieve excellent u-values, certified according to passive house standards.

Multi-chamber technology and a range of glazing options to achieve u-values as low as 0.78 W/m2K.