Fakro FTT/U/C U6 Polyurethane (PU) Coated Off-Centre Pivot Conservation Window with U6 Energy Efficient Triple Glazed Laminated Glass. DescriptionThe FTT/U/C off-centre pivot conservation window has a hinge situated above the centre of the window height, so even a tall person can comfortably stand at the open window. A conveniently positioned handle at the bottom of the sash makes the window easy to open and close. Easy to both clean the outer window pane and operate the awning blind with the use of  a blocking sash bolt when the sash is rotated through 180 degrees. U6 Glazing Features Double chamber glazing (6HT “ Tg18Ar “ 4H “ Tg18Ar “ 33.2T). Consists of three panes: external toughened pane, internal toughened with low emission layer and inner laminated anti-burglary class P2A. The unit has two warm TGI spacers. The chamber cavities are filled with inert gas-argon. Ug0.5 W/mK.