Internorm Banner

Internorm I-TEC Locking Technology


The invisible locking system

I-Tec locking is the first major stride in hardware technology since the introduction of the "Turn&Tilt" lock at the beginning of the 1970's. Internorm uses concealed hinges as standard. Now, Internorm is applying this same principle to their window frame by creating a window with no visible hardware. I-Tec locking can be seen in the home pure UPVC & UPVC/Aluminium window KF 500 and is revolutionary in more than one aspect. It has no visible locking parts on the frame are instead of the usual locking pegs, integrated flaps provide for safe locking. The contact points for the locking flaps are secured invisibly in the hollow chambers of the sash profile.

Convenient cleaning

The cleaning of the frames are made much easier as there are little to no locking components on the frame. The few components on the sash hardly protrude leaving the smooth, easy to clean UPVC surface of the window to easily clean.

Security which convinces

Windows with I-Tec locking comply in their standard version with resistance class RC2N (with lockable handle and burglary resistant glass RC2) according to EN 1627-1630 – as standard tested burglary protection.

Perfect stability and sophisticated design

The ingenious construction enables 30 % less wide view widths. Generous window sizes and energy saving triple glazing require heavy sash versions. The window is held by a four-joint hinge at the bottom and a stay-arm hinge at the top. The new construction of hinge parts allows sash weights of up to 130 kg in compact design.

Advantages at a glance:

  • 30 % less wide view widths of frame and sash
  • RC2N as standard without functioning restrictions
  • Trendsetting thermal insulation as standard
  • Uw ≤ 0.69 W/m²K