| | | FTTThermo is a specialist roof window whose innovative building structure ensures outstanding energy saving properties. This roof window is characterised by an extremely advantageous overall heat transfer co-efficient of, U window = 0.94 Wm2K, which enables its application in buildings where heat loss reduction is particularly required e.g. passive buildings, | | FTT is a centre pivot roof window equipped with an excellent energy saving two-chamber windowpane unit placed in a thicker, wooden sash frame. Properly designed and manufactured it has, along with its installation system exploiting moisture and wind resistant accessories, excellent thermo-insulating parameters and the highest (4) tightness class as regards air leakage, (classification PN-EN 12207, research norm PNEN1026). | | |