HT 410 TIMBER/ALUMINIUM ENTRANCE DOOR TECHNICAL DATA: Design styles Thermal insulation Very high thermal insulation U D up to 0.58 W/m 2 K Sound insulation Soundproofing up to 37 dB Security Up to WK2, 3 point locking as standard System description Construction depth 121 mm Three-dimensionally adjustable, concealed door hinges Plate construction made of the material composite timber/ aluminium, thermal foam, plywood, purenit and phenol plate inserts ensure tremendous stability even in extreme weather conditions Plate construction in highest climate class c/d/e class 3 Triple gasket construction Side elements – quadruple glazing with two coatings and ISO spacer ensure excellent technical values Glazing for fixed side element as standard in VSG (laminated security glass) 3 model series for different design versions Colour options matching the Internorm timber/aluminium window systems studio FLUSH KEY HOLE COVER PLATE Also the key hole cover plate fits in perfectly with the flush design. flush recessed handles for outside are optionally available. CONCEALED DOOR HINGES Perfect design up to the door hinges, these are, contrary to conventional door hinges, fully concealed (image on the left). Inside view