The completely flush transition from frame and sash as well as the integrated sun protection between the panes combines HV 450 to one unit. Blinds, Venetian Blinds or Duette® blinds are protected from dirt through integrated installation. Enjoy quadruple protection in one window through perfect sun and privacy protection, thermal insulation and sound reduction. The I-tec shading works completely energy self-sufficiently and offers many more useful functions. Convenient operation via I-tec Smart Window is also available.