System 4500

System 4500

A very unique product for large openings in both residential and commercial markets.

The tilt-turn is the dominant window style in Europe, now gaining popularity among discerning architects, designers and homeowners in North America. The System 4500 is a versatile design featuring three windows in one: An inward opening casement in the turn position, a secure top-venting hopper in the tilt position and a tightly sealed picture window when closed. 

Matching doors in a variety of configurations are available.

The system is available in white, beige or clay and can be laminated with solid color or wood-grain foils.


  • Multiple locking points and dual weather seals for optimal air and water tightness.
  • Up to 1 3/8 in glazing capability for increased energy efficiency and acoustical performance.
  • Large chambers for accommodation of reinforcements required for large openings and heavy commercial applications.
  • High-definition finish for weather and stain resistance and ease of maintenance.


Test ResultsDescription
NAFS (PG)up to CW-PG75


Impact Resistant DP-65 (HVHZ)
ASTM E90 Acoustical (STC)up to 41 dB


(*based on simulation)

down to 0.18*


System 4500 Window & Door Brochure
System 4500 Tilt-Turn Sell Sheet
System 4500 Tilt-Turn Window Specification
System 4500 Tilt-Turn Impact-Rated Windows Specification
System 4500 Fixed Windows Specification
System 4500 Fixed Impact-Rated Windows Specification
System 4500 Hopper Window Specification