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Engineering Design

Preferred Engineering Products' designs all of its products for quality and durability for the life of your window. Our hardware systems are designed on state-of-the-art 3D software and are manufactured to exacting tolerances to ensure that our hardware systems are the best in the industry. Bar none.

Our Engineering Department is available to work with you to assist in designing and modifying your windows for the Tilt'N'Slide™ and Parallex™ systems. We can also assist in the design of new window extrusions for the Parallex™ system.

For more information or assistance with your window design contact our Engineering Department at: info@preferred-eng.com.

Performance Testing

Testing Lab Preferred Engineering Products' in-house testing facility ensures that all of our system hardware is capable of withstanding the harshest conditions and abuse that your windows may experience. However, window operating hardware is typically tested as a component of a finished window, the window itself is then granted the certification for which it has been tested.

When windows are tested for performance they are subjected to testing procedures designed to measure different performance aspects. A window's performance level is a function of the frame, glass and hardware components working together to provide a functional window. While these tests measure the performance as a complete unit, performance is affected by the individual components themselves. In all cases of testing with Preferred Engineering Products hardware, window failure was due to components other than the operating hardware.

Preferred Engineering Toll Free: 1-800-387-5835