System 4500 window designs offer a very unique product for large openings
in both residential and commercial markets. The versatile design is three
windows in one: A secure top-venting hopper in the tilt position, an inward
opening casement in the turn position and a tightly sealed picture window
when closed for outstanding thermal and acoustical performance.
With the System 4500, tilt-turn, awning, hopper and fixed configurations are
possible. Matching doors in a variety of configurations are available.
Some of North America’s highest performing window units are produced using
the REHAU System 4500.