Firelight DUO is manufactured completely from high quality components; its principal component is corrosion-resistant high quality aluminium.

The Firelight Duo is thermally separated. The three sealing levels are achieved by a total of five high-quality, all-round EPDM and TPE seals. There are two seals between the panel and the flaps, and the three other seals are installed in the frame and in the flaps. As a result there is very low air leakage and a low U value. Furthermore, the risk of condensation is reduced to a minimum.

The Firelight Duo is therefore ideally positioned for the future at a time when there are increasing demands for energy efficient buildings.