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Unique Operation and Unmatched Performance

System 4500 window designs offer a very unique product for large openings in both residential and commercial markets. The versatile tilt-turn window 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.

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