The ventilation function for side-hung window sashes is usually limited to the complete opening of the window sash or is only limited to gap dimensions by locking devices.

With the completely concealed, stepless hold-open limiter, WSS has created a solution that is simply operated via the window handle (one-hand operation) and secures a stepless opening position of up to 90°. It is operated exclusively via the window handle. The hold-open limiter is locked in place by friction.

In addition, the hold-open limiter is equipped with an end stop at 90°, which prevents the hinges from hitting the reveal or overwinding.

Sashes from 650 to 1,700 mm wide can be fixed and secured using two different scissor stay sizes.